{"id":2017,"date":"2021-08-18T13:39:45","date_gmt":"2021-08-18T13:39:45","guid":{"rendered":"https:\/\/physicscatalyst.com\/testprep\/?p=2017"},"modified":"2021-12-16T05:52:13","modified_gmt":"2021-12-16T05:52:13","slug":"online-test-for-class-11-physics-thermal-properties-of-matter","status":"publish","type":"post","link":"https:\/\/physicscatalyst.com\/testprep\/class-11-physics\/online-test-for-class-11-physics-thermal-properties-of-matter\/","title":{"rendered":"Online Test for Class 11 Physics Thermal Properties of Matter"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Thermal Properties of Matter Class 11 MCQs Questions with Answers<\/h2>\n\n\n\n<p>Welcome to this Free Online Mock Test Class 11 Physics Thermal Properties of Matter. This test contains MCQs for Chapter 11 Thermal Properties of Matter with Answers for Class 11 Physics. The MCQ questions were created using the most recent exam format. Practicing these questions would allow students to check their knowledge and have a good grasp of the concepts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">MCQ Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter with Answers<\/h3>\n\n\n<script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>  \n  \n<div  id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam313\" style=\"display:none;text-align:center;\">Please wait...<br><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-313\"><hr>\n<p><strong>General Instructions<\/strong><\/p>\n<ol>\n<li>Your test contains multiple-choice questions with only one answer type questions. There are a total of 20 questions<\/li>\n<li>This is a 30 min test. Please make sure you complete it in stipulated time<\/li>\n<li>You can finish this test any time using the 'Submit' button.<\/li>\n<\/ol>\n<hr>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-313\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-5698'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>1. <\/span>Consider two rods of same length and different specific heats $(S_1 , S_2 )$, conductivities $(K_1 , K_2 )$ and area of cross-sections $(A_1 , A_2 )$ and both having temperature $T_1$ and $T_2$ at their ends. If the rate of loss of heat due to conduction is equal, then<\/div><input type='hidden' name='question_id[]' id='qID_1' value='5698' class='watupro-question-id'\/><input type='hidden' id='answerType5698' class='answerTypeCnt1' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5698'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5698[]' id='answer-id-22694' class='answer   answerof-5698  ' value='22694'   \/><label for='answer-id-22694' id='answer-label-22694' class=' answer'><span>$K_1 A_1 = K_2 A_2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5698[]' id='answer-id-22695' class='answer   answerof-5698  ' value='22695'   \/><label for='answer-id-22695' id='answer-label-22695' class=' answer'><span>$K_1 \\frac{A_1}{S_1} = K_2 \\frac{A_2}{S_2}$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5698[]' id='answer-id-22696' class='answer   answerof-5698  ' value='22696'   \/><label for='answer-id-22696' id='answer-label-22696' class=' answer'><span>$K_2 A_1 = K_1 A_2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5698[]' id='answer-id-22697' class='answer   answerof-5698  ' value='22697'   \/><label for='answer-id-22697' id='answer-label-22697' class=' answer'><span>$K_2 \\frac{A_1}{S_2} = K_1 \\frac{A_2}{S_2}$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-5699'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>2. <\/span>Unit of Stefan\u2019s constant is <\/div><input type='hidden' name='question_id[]' id='qID_2' value='5699' class='watupro-question-id'\/><input type='hidden' id='answerType5699' class='answerTypeCnt2' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5699'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5699[]' id='answer-id-22698' class='answer   answerof-5699  ' value='22698'   \/><label for='answer-id-22698' id='answer-label-22698' class=' answer'><span>$Watt\\, m^2 K^4$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5699[]' id='answer-id-22699' class='answer   answerof-5699  ' value='22699'   \/><label for='answer-id-22699' id='answer-label-22699' class=' answer'><span>$Watt\\, m^2\/K^4$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5699[]' id='answer-id-22700' class='answer   answerof-5699  ' value='22700'   \/><label for='answer-id-22700' id='answer-label-22700' class=' answer'><span>$Watt\/m^2\\, K $<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5699[]' id='answer-id-22701' class='answer   answerof-5699  ' value='22701'   \/><label for='answer-id-22701' id='answer-label-22701' class=' answer'><span>$Watt\/m^2\\, K^4$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-5700'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>3. <\/span>On a cold morning, a metal surface will feel colder to touch than a wooden surface, because<\/div><input type='hidden' name='question_id[]' id='qID_3' value='5700' class='watupro-question-id'\/><input type='hidden' id='answerType5700' class='answerTypeCnt3' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5700'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5700[]' id='answer-id-22702' class='answer   answerof-5700  ' value='22702'   \/><label for='answer-id-22702' id='answer-label-22702' class=' answer'><span>Metal has a high specific heat<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5700[]' id='answer-id-22703' class='answer   answerof-5700  ' value='22703'   \/><label for='answer-id-22703' id='answer-label-22703' class=' answer'><span>Metal has a high thermal conductivity<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5700[]' id='answer-id-22704' class='answer   answerof-5700  ' value='22704'   \/><label for='answer-id-22704' id='answer-label-22704' class=' answer'><span>Metal has a high specific heat<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5700[]' id='answer-id-22705' class='answer   answerof-5700  ' value='22705'   \/><label for='answer-id-22705' id='answer-label-22705' class=' answer'><span>Metal has a low thermal conductivity<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-5701'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>4. <\/span>The sprinkling of water reduces slightly the temperature of a closed room, because <\/div><input type='hidden' name='question_id[]' id='qID_4' value='5701' class='watupro-question-id'\/><input type='hidden' id='answerType5701' class='answerTypeCnt4' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5701'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5701[]' id='answer-id-22706' class='answer   answerof-5701  ' value='22706'   \/><label for='answer-id-22706' id='answer-label-22706' class=' answer'><span>the temperature of the water is less than that of the room. <\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5701[]' id='answer-id-22707' class='answer   answerof-5701  ' value='22707'   \/><label for='answer-id-22707' id='answer-label-22707' class=' answer'><span>specific heat of water is high<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5701[]' id='answer-id-22708' class='answer   answerof-5701  ' value='22708'   \/><label for='answer-id-22708' id='answer-label-22708' class=' answer'><span>water has a large latent heat of vaporization.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5701[]' id='answer-id-22709' class='answer   answerof-5701  ' value='22709'   \/><label for='answer-id-22709' id='answer-label-22709' class=' answer'><span>water is bad conductor of heat<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-5702'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>5. <\/span>The wavelength of radiation emitted by a body depends upon<\/div><input type='hidden' name='question_id[]' id='qID_5' value='5702' class='watupro-question-id'\/><input type='hidden' id='answerType5702' class='answerTypeCnt5' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5702'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5702[]' id='answer-id-22710' class='answer   answerof-5702  ' value='22710'   \/><label for='answer-id-22710' id='answer-label-22710' class=' answer'><span>The nature of the surface<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5702[]' id='answer-id-22711' class='answer   answerof-5702  ' value='22711'   \/><label for='answer-id-22711' id='answer-label-22711' class=' answer'><span>The area of the surface<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5702[]' id='answer-id-22712' class='answer   answerof-5702  ' value='22712'   \/><label for='answer-id-22712' id='answer-label-22712' class=' answer'><span>the temperature of the surface<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5702[]' id='answer-id-22713' class='answer   answerof-5702  ' value='22713'   \/><label for='answer-id-22713' id='answer-label-22713' class=' answer'><span>All the above<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-6' style=';'><div id='questionWrap-6'  class='   watupro-question-id-5703'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>6. <\/span>Which of the following is more close to a black body?<\/div><input type='hidden' name='question_id[]' id='qID_6' value='5703' class='watupro-question-id'\/><input type='hidden' id='answerType5703' class='answerTypeCnt6' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5703'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5703[]' id='answer-id-22714' class='answer   answerof-5703  ' value='22714'   \/><label for='answer-id-22714' id='answer-label-22714' class=' answer'><span>Green leaves<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5703[]' id='answer-id-22715' class='answer   answerof-5703  ' value='22715'   \/><label for='answer-id-22715' id='answer-label-22715' class=' answer'><span>Black holes<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5703[]' id='answer-id-22716' class='answer   answerof-5703  ' value='22716'   \/><label for='answer-id-22716' id='answer-label-22716' class=' answer'><span>Blackboard paint<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5703[]' id='answer-id-22717' class='answer   answerof-5703  ' value='22717'   \/><label for='answer-id-22717' id='answer-label-22717' class=' answer'><span>red roses<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-7' style=';'><div id='questionWrap-7'  class='   watupro-question-id-5704'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>7. <\/span>If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor<\/div><input type='hidden' name='question_id[]' id='qID_7' value='5704' class='watupro-question-id'\/><input type='hidden' id='answerType5704' class='answerTypeCnt7' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5704'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5704[]' id='answer-id-22718' class='answer   answerof-5704  ' value='22718'   \/><label for='answer-id-22718' id='answer-label-22718' class=' answer'><span>16<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5704[]' id='answer-id-22719' class='answer   answerof-5704  ' value='22719'   \/><label for='answer-id-22719' id='answer-label-22719' class=' answer'><span>8<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5704[]' id='answer-id-22720' class='answer   answerof-5704  ' value='22720'   \/><label for='answer-id-22720' id='answer-label-22720' class=' answer'><span>4<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5704[]' id='answer-id-22721' class='answer   answerof-5704  ' value='22721'   \/><label for='answer-id-22721' id='answer-label-22721' class=' answer'><span>2<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-8' style=';'><div id='questionWrap-8'  class='   watupro-question-id-5705'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>8. <\/span>The ratio of the thermal conductivity of two rods of different material is 5 : 4. The two rods of same area of cross-section  and same thermal resistance will have the length in the ratio<\/div><input type='hidden' name='question_id[]' id='qID_8' value='5705' class='watupro-question-id'\/><input type='hidden' id='answerType5705' class='answerTypeCnt8' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5705'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5705[]' id='answer-id-22722' class='answer   answerof-5705  ' value='22722'   \/><label for='answer-id-22722' id='answer-label-22722' class=' answer'><span>4 : 5<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5705[]' id='answer-id-22723' class='answer   answerof-5705  ' value='22723'   \/><label for='answer-id-22723' id='answer-label-22723' class=' answer'><span>1 : 9<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5705[]' id='answer-id-22724' class='answer   answerof-5705  ' value='22724'   \/><label for='answer-id-22724' id='answer-label-22724' class=' answer'><span>5 : 4<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5705[]' id='answer-id-22725' class='answer   answerof-5705  ' value='22725'   \/><label for='answer-id-22725' id='answer-label-22725' class=' answer'><span>9 : 1<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-9' style=';'><div id='questionWrap-9'  class='   watupro-question-id-5706'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>9. <\/span>Three rods of equal length of thermal conductivities k, 2k and 3k are symmetrically joined to a point. If temperature of ends are 0&deg; C, 50 &deg; C and 100 &deg; C respectively. What is the temperature of the junction?<\/div><input type='hidden' name='question_id[]' id='qID_9' value='5706' class='watupro-question-id'\/><input type='hidden' id='answerType5706' class='answerTypeCnt9' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5706'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5706[]' id='answer-id-22726' class='answer   answerof-5706  ' value='22726'   \/><label for='answer-id-22726' id='answer-label-22726' class=' answer'><span>24 &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5706[]' id='answer-id-22727' class='answer   answerof-5706  ' value='22727'   \/><label for='answer-id-22727' id='answer-label-22727' class=' answer'><span>28 &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5706[]' id='answer-id-22728' class='answer   answerof-5706  ' value='22728'   \/><label for='answer-id-22728' id='answer-label-22728' class=' answer'><span>66.66 &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5706[]' id='answer-id-22729' class='answer   answerof-5706  ' value='22729'   \/><label for='answer-id-22729' id='answer-label-22729' class=' answer'><span>33.33 &deg; C<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-10' style=';'><div id='questionWrap-10'  class='   watupro-question-id-5707'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>10. <\/span>Three discs, A, B and C having radii 2m, 4m and6m respectively are coated with carbon black on their outer surfaces. The wavelengths corresponding to maximum intensity are 300nm, 400nm and 500 nm, respectively. The power radiated by them are $Q_A$, $Q_B$ and $Q_C$ respectively <\/div><input type='hidden' name='question_id[]' id='qID_10' value='5707' class='watupro-question-id'\/><input type='hidden' id='answerType5707' class='answerTypeCnt10' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5707'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5707[]' id='answer-id-22730' class='answer   answerof-5707  ' value='22730'   \/><label for='answer-id-22730' id='answer-label-22730' class=' answer'><span>$Q_A$ is maximum <\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5707[]' id='answer-id-22731' class='answer   answerof-5707  ' value='22731'   \/><label for='answer-id-22731' id='answer-label-22731' class=' answer'><span>$Q_B$ is maximum <\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5707[]' id='answer-id-22732' class='answer   answerof-5707  ' value='22732'   \/><label for='answer-id-22732' id='answer-label-22732' class=' answer'><span>$Q_C$ is maximum <\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5707[]' id='answer-id-22733' class='answer   answerof-5707  ' value='22733'   \/><label for='answer-id-22733' id='answer-label-22733' class=' answer'><span>$Q_A = Q_B = Q_C$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-11' style=';'><div id='questionWrap-11'  class='   watupro-question-id-5708'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>11. <\/span>In the following question, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given responses.<br \/>\r\n<br \/>\r\n<strong>Assertion:<\/strong> Water kept in an open vessel will quickly evaporate on the surface of the moon.<br \/>\r\n<strong>Reason:<\/strong> The temperature at the surface of the moon is much higher than the boiling point of water.<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_11' value='5708' class='watupro-question-id'\/><input type='hidden' id='answerType5708' class='answerTypeCnt11' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5708'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5708[]' id='answer-id-22734' class='answer   answerof-5708  ' value='22734'   \/><label for='answer-id-22734' id='answer-label-22734' class=' answer'><span>If both assertion and reason are true and the reason is the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5708[]' id='answer-id-22735' class='answer   answerof-5708  ' value='22735'   \/><label for='answer-id-22735' id='answer-label-22735' class=' answer'><span>If both assertion and reason are true but the reason is not the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5708[]' id='answer-id-22736' class='answer   answerof-5708  ' value='22736'   \/><label for='answer-id-22736' id='answer-label-22736' class=' answer'><span>If the assertion is true, but the reason is false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5708[]' id='answer-id-22737' class='answer   answerof-5708  ' value='22737'   \/><label for='answer-id-22737' id='answer-label-22737' class=' answer'><span>If both assertion and reason are false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5708[]' id='answer-id-22738' class='answer   answerof-5708  ' value='22738'   \/><label for='answer-id-22738' id='answer-label-22738' class=' answer'><span>If the reason is true but the assertion is false<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-12' style=';'><div id='questionWrap-12'  class='   watupro-question-id-5709'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>12. <\/span>In the following question, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given responses.<br \/>\r\n<br \/>\r\n<strong>Assertion:<\/strong> A hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation.<br \/>\r\n<strong>Reason:<\/strong> All metals act as a black body.<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_12' value='5709' class='watupro-question-id'\/><input type='hidden' id='answerType5709' class='answerTypeCnt12' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5709'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5709[]' id='answer-id-22739' class='answer   answerof-5709  ' value='22739'   \/><label for='answer-id-22739' id='answer-label-22739' class=' answer'><span>If both assertion and reason are true and the reason is the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5709[]' id='answer-id-22740' class='answer   answerof-5709  ' value='22740'   \/><label for='answer-id-22740' id='answer-label-22740' class=' answer'><span>If both assertion and reason are true but the reason is not the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5709[]' id='answer-id-22741' class='answer   answerof-5709  ' value='22741'   \/><label for='answer-id-22741' id='answer-label-22741' class=' answer'><span>If the assertion is true, but the reason is false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5709[]' id='answer-id-22742' class='answer   answerof-5709  ' value='22742'   \/><label for='answer-id-22742' id='answer-label-22742' class=' answer'><span>If both assertion and reason are false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5709[]' id='answer-id-22743' class='answer   answerof-5709  ' value='22743'   \/><label for='answer-id-22743' id='answer-label-22743' class=' answer'><span>If the reason is true but the assertion is false<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-13' style=';'><div id='questionWrap-13'  class='   watupro-question-id-5710'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>13. <\/span>In the following question, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given responses.<br \/>\r\n<br \/>\r\n<strong>Assertion:<\/strong> Blue star is at high temperature than red star.<br \/>\r\n<strong>Reason:<\/strong> Wein\u2019s displacement law states that $T \\alpha (1\/ \\lambda_m).<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_13' value='5710' class='watupro-question-id'\/><input type='hidden' id='answerType5710' class='answerTypeCnt13' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5710'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5710[]' id='answer-id-22744' class='answer   answerof-5710  ' value='22744'   \/><label for='answer-id-22744' id='answer-label-22744' class=' answer'><span>If both assertion and reason are true and the reason is the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5710[]' id='answer-id-22745' class='answer   answerof-5710  ' value='22745'   \/><label for='answer-id-22745' id='answer-label-22745' class=' answer'><span>If both assertion and reason are true but the reason is not the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5710[]' id='answer-id-22746' class='answer   answerof-5710  ' value='22746'   \/><label for='answer-id-22746' id='answer-label-22746' class=' answer'><span>If the assertion is true, but the reason is false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5710[]' id='answer-id-22747' class='answer   answerof-5710  ' value='22747'   \/><label for='answer-id-22747' id='answer-label-22747' class=' answer'><span>If both assertion and reason are false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5710[]' id='answer-id-22748' class='answer   answerof-5710  ' value='22748'   \/><label for='answer-id-22748' id='answer-label-22748' class=' answer'><span>If the reason is true but the assertion is false<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-14' style=';'><div id='questionWrap-14'  class='   watupro-question-id-5711'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>14. <\/span>In the following question, a statement of assertion is followed by a statement of reason. You are required to choose the correct one out of the given responses.<br \/>\r\n<br \/>\r\n<strong>Assertion:<\/strong> A brass tumbler feels much colder than a wooden tray on a chilly day.<br \/>\r\n<strong>Reason:<\/strong> The thermal conductivity of brass is less than that of wood.<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_14' value='5711' class='watupro-question-id'\/><input type='hidden' id='answerType5711' class='answerTypeCnt14' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5711'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5711[]' id='answer-id-22749' class='answer   answerof-5711  ' value='22749'   \/><label for='answer-id-22749' id='answer-label-22749' class=' answer'><span>If both assertion and reason are true and the reason is the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5711[]' id='answer-id-22750' class='answer   answerof-5711  ' value='22750'   \/><label for='answer-id-22750' id='answer-label-22750' class=' answer'><span>If both assertion and reason are true but the reason is not the correct explanation of the assertion.<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5711[]' id='answer-id-22751' class='answer   answerof-5711  ' value='22751'   \/><label for='answer-id-22751' id='answer-label-22751' class=' answer'><span>If the assertion is true, but the reason is false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5711[]' id='answer-id-22752' class='answer   answerof-5711  ' value='22752'   \/><label for='answer-id-22752' id='answer-label-22752' class=' answer'><span>If both assertion and reason are false<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5711[]' id='answer-id-22753' class='answer   answerof-5711  ' value='22753'   \/><label for='answer-id-22753' id='answer-label-22753' class=' answer'><span>If the reason is true but the assertion is false<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-15' style=';'><div id='questionWrap-15'  class='   watupro-question-id-5712'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>15. <\/span>An electric heater is used in a room with a total wall area of $137m^2$ to maintain a temperature of +20 C inside it when the outside temperature is \u221210C. The walls have three different layers of materials. The innermost layer is of wood thickness 2.5cm, the middle layer is of cement of thickness 1.0cm and the outermost layer is of brick of thickness 25.0cm. Assume that there is no heat loss through the floor and the ceiling. The internal conductivities of wood, cement and brick are 0.125,1,5 and 1.0 watt\/m\/ &deg; C respectively.<br \/>\r\nWhat is the equivalent thermal conductivity of the wall?<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_15' value='5712' class='watupro-question-id'\/><input type='hidden' id='answerType5712' class='answerTypeCnt15' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5712'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5712[]' id='answer-id-22754' class='answer   answerof-5712  ' value='22754'   \/><label for='answer-id-22754' id='answer-label-22754' class=' answer'><span>.512 watt\/m\/ &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5712[]' id='answer-id-22755' class='answer   answerof-5712  ' value='22755'   \/><label for='answer-id-22755' id='answer-label-22755' class=' answer'><span>.624 watt\/m\/ &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5712[]' id='answer-id-22756' class='answer   answerof-5712  ' value='22756'   \/><label for='answer-id-22756' id='answer-label-22756' class=' answer'><span>.134 watt\/m\/ &deg; C<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5712[]' id='answer-id-22757' class='answer   answerof-5712  ' value='22757'   \/><label for='answer-id-22757' id='answer-label-22757' class=' answer'><span>.986 watt\/m\/ &deg; C<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-16' style=';'><div id='questionWrap-16'  class='   watupro-question-id-5713'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>16. <\/span>Find the power of the electric heater<\/div><input type='hidden' name='question_id[]' id='qID_16' value='5713' class='watupro-question-id'\/><input type='hidden' id='answerType5713' class='answerTypeCnt16' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5713'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5713[]' id='answer-id-22758' class='answer   answerof-5713  ' value='22758'   \/><label for='answer-id-22758' id='answer-label-22758' class=' answer'><span>1000 W<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5713[]' id='answer-id-22759' class='answer   answerof-5713  ' value='22759'   \/><label for='answer-id-22759' id='answer-label-22759' class=' answer'><span>8000 W<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5713[]' id='answer-id-22760' class='answer   answerof-5713  ' value='22760'   \/><label for='answer-id-22760' id='answer-label-22760' class=' answer'><span>9000 W<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5713[]' id='answer-id-22761' class='answer   answerof-5713  ' value='22761'   \/><label for='answer-id-22761' id='answer-label-22761' class=' answer'><span>11000 W<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-17' style=';'><div id='questionWrap-17'  class='   watupro-question-id-5714'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>17. <\/span>The temperature of the sun is measured with<\/div><input type='hidden' name='question_id[]' id='qID_17' value='5714' class='watupro-question-id'\/><input type='hidden' id='answerType5714' class='answerTypeCnt17' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5714'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5714[]' id='answer-id-22762' class='answer   answerof-5714  ' value='22762'   \/><label for='answer-id-22762' id='answer-label-22762' class=' answer'><span>pyrometer<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5714[]' id='answer-id-22763' class='answer   answerof-5714  ' value='22763'   \/><label for='answer-id-22763' id='answer-label-22763' class=' answer'><span>gas thermometer<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5714[]' id='answer-id-22764' class='answer   answerof-5714  ' value='22764'   \/><label for='answer-id-22764' id='answer-label-22764' class=' answer'><span>Platinum resistance thermometer<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5714[]' id='answer-id-22765' class='answer   answerof-5714  ' value='22765'   \/><label for='answer-id-22765' id='answer-label-22765' class=' answer'><span>vapor pressure thermometer<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-18' style=';'><div id='questionWrap-18'  class='   watupro-question-id-5715'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>18. <\/span>The coefficient of linear expansion of brass and steel are $\\alpha _1$ and $\\alpha _2$. If we take a brass rod of length $l_1$ and steel rod of length $l_2$ at 0 &deg; C and their difference in length ($l_2 \u2212l_1$) will remain the same at all temperatures if<\/div><input type='hidden' name='question_id[]' id='qID_18' value='5715' class='watupro-question-id'\/><input type='hidden' id='answerType5715' class='answerTypeCnt18' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5715'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5715[]' id='answer-id-22766' class='answer   answerof-5715  ' value='22766'   \/><label for='answer-id-22766' id='answer-label-22766' class=' answer'><span>$\\alpha _1 l_1=\\alpha _2 l_2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5715[]' id='answer-id-22767' class='answer   answerof-5715  ' value='22767'   \/><label for='answer-id-22767' id='answer-label-22767' class=' answer'><span>$\\alpha _1 l_2=\\alpha _2 l_1$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5715[]' id='answer-id-22768' class='answer   answerof-5715  ' value='22768'   \/><label for='answer-id-22768' id='answer-label-22768' class=' answer'><span>$\\alpha _1^2 l_1=\\alpha _2^2 l_2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5715[]' id='answer-id-22769' class='answer   answerof-5715  ' value='22769'   \/><label for='answer-id-22769' id='answer-label-22769' class=' answer'><span>$\\alpha _1 l_2^2=\\alpha _2 l_1^2$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-19' style=';'><div id='questionWrap-19'  class='   watupro-question-id-5716'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>19. <\/span>Woolen clothes keep the body warm because wool<\/div><input type='hidden' name='question_id[]' id='qID_19' value='5716' class='watupro-question-id'\/><input type='hidden' id='answerType5716' class='answerTypeCnt19' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5716'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5716[]' id='answer-id-22770' class='answer   answerof-5716  ' value='22770'   \/><label for='answer-id-22770' id='answer-label-22770' class=' answer'><span>decreases the temperature<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5716[]' id='answer-id-22771' class='answer   answerof-5716  ' value='22771'   \/><label for='answer-id-22771' id='answer-label-22771' class=' answer'><span>increases the temperature of the body<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5716[]' id='answer-id-22772' class='answer   answerof-5716  ' value='22772'   \/><label for='answer-id-22772' id='answer-label-22772' class=' answer'><span>is a bad conductor<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5716[]' id='answer-id-22773' class='answer   answerof-5716  ' value='22773'   \/><label for='answer-id-22773' id='answer-label-22773' class=' answer'><span>all of these<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-20' style=';'><div id='questionWrap-20'  class='   watupro-question-id-5717'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>20. <\/span>Emissive and absorptive power of material at 2000K is 8 and 10 respectively, calculate the emissivity of IBB (ideal black body<br \/>\r\n<\/div><input type='hidden' name='question_id[]' id='qID_20' value='5717' class='watupro-question-id'\/><input type='hidden' id='answerType5717' class='answerTypeCnt20' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices5717'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5717[]' id='answer-id-22774' class='answer   answerof-5717  ' value='22774'   \/><label for='answer-id-22774' id='answer-label-22774' class=' answer'><span>0.2 <\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5717[]' id='answer-id-22775' class='answer   answerof-5717  ' value='22775'   \/><label for='answer-id-22775' id='answer-label-22775' class=' answer'><span>0.4<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-5717[]' id='answer-id-22776' class='answer   answerof-5717  ' value='22776'   \/><label for='answer-id-22776' id='answer-label-22776' class=' answer'><span>0.6<\/span><\/label><\/div><div class='watupro-question-choice  ' 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