Test Series-22

## Instructions

• Your test contains 12 multiple choice questions with only one answer
• This is 30 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers and their solutions.

1.which of the following is not correct about electrical circuit
• Ammeter is connected with series
• Voltmeter is connected in parallel
• electric current is the flow of electrons in the metal wire
• None of these

You are given three resistances of 2,4 and 6 ohm.
2) What will be the equivalent resistance if they are connected in series
• 6 ohm
• 1.2 ohm
• 12 ohm
• 2 ohm

3. What will be the equivalent resistance if they are connected in parallel ?
• 5 ohm
• 1.2 ohm
• 12 ohm
• none of these

4.what should be arrangement of the three resistors to get 5 ohm as equivalent resistance?
• 2,4,6 are in parallel
• 2 and 4 ohm resistor in parallel with 6 ohm in series
• 2 and 6 ohm resistor in parallel with 4 ohm in series
• 4 and 6 ohm resistor in parallel with 2 ohm in series

5.How many electrons should pass through the conductor in 1 sec to constitute 2 Ampere current? Given : Charge on electron=1.6X10-19 coulombs
• 13XX1018
• 4.5XX1018
• 6.25X1018
• 12.5X1018

6. The resistivity of a substance does not depend upon?
• Length or thickness of the material
• Nature of the material
• temperature of the material
• None of these

7. A electric heater is rated at 200V-400W. What is the resistance of the heater
• 200ohm
• 100 ohm
• 400 ohm
• 50 ohm

8. There are two statements A Formula fpr Power is P=VI B Formula fpr Power is P=I2R Which one of the following is correct?
• A only
• B only
• Both A and B are correct
• Both A and B are wrong

9.A potential difference of 100 Volt is applied across a resistor of resistance 10 ohm. Find the heat energy produced in 10 sec?
• 10kJ
• 500J
• 1000J
• none of these

10.How many joules are there in one kilowatt-hour?
• 3.6X106 J
• 1.6X106 J
• 3.6X104 J
• None of these

11. What is the power of an electric lamp, if it draws 20 A current when connected to 220 V line? ?
• 110Watt
• 240watt
• 4400Watt
• none of thes

12. A wire whose length L and area of crossection A has R resistance. If the length of a wire is doubled, and its cross section is also doubled, then what will be its resistance? ?
• R
• 2R
• R/2
• 4R