Test Series-18

## 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.Identify a mirror having focal length –35cm?
• Convex
• concave
• plane

An object 5.0cm in length is pl aced at a distance of 20cm in front of a convex mirror of radius of Curvature 30cm
2) Find the position of the image ?
• 8.1cm
• 8.6 cm
• None of these

3. Find the nature of the image
• Virtual ,inverted
• real,inverted
• Virtual ,erect
• real ,erect

4..Find the size of the image?
• 7.1cm
• 5cm
• 2.2 cm
• None of these

5.An object of height 5 cm is placed at 30 cm from a concave mirror of focal lenght 15 cm.Which one is true
• A virtual inverted image will be formed at 10 cm and will be of diminished size then object
• A real erect image will be formed at 30 cm and will be of same size as object
• A real inverted image will be formed at 30 cm and will be of same size as object

6. The image formed by a convex mirror for an object placed at infinity is ?
• Behind the mirror at focus
• Behind the mirror between focus and pole
• infront of mirror at focus
• None of these

7. Nomatter how far you stand from a spherical mirror , your image appears erect. The mirror may be?
• convex
• concave
• plane
• either plane or concave

8. which of these is false for plane mirror?
• focal lenght is infinite
• Power of the plane mirror is zero
• Magnification produced is 1
• None of these

9.A concave mirror is a part of a sphere of radius 60cm.It’s focal length is?
• 60cm
• 15cm
• 30
• infinity

10.Which mirror is used as rear-view mirror in vehicles?
• convex
• concave
• plane

11. A concave mirror produces three times magnified (enlarged) real image of object placed at 10 cm in front of it. Where is the image located?
• 30 cm
• 3.3cm
• 33cm
• none of these

12. when an object is placed at infinity from the concave mirror,the image is formed at?
• infinity