NDA PHYSICS QUIZ - 6

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Question 1:

A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored?

Question 2:

If the power of a corrective lens is + 2.0 D , then it is a –

Question 3:

On which principle does a periscope work?

Question 4:

Which of the following is true for the image formed by a plane mirror?

Question 5:

In optical instruments, the lenses are used to form image by the phenomenon of ?

Question 6:

At what angle should two plane mirrors be placed to obtain three images of an object?

Question 7:

An object is placed at a distance of 60 cm from a concave mirror. What should be the focal length of the concave mirror to get its magnification of 1/2?

Question 8:

Which of the following is true for magnification produced by a lens?

Question 9:

What is the radius of curvature of a plane mirror?

Question 10:

What is the reason for the small air bubbles in the water collected in a glass vessel to shine with a silvery luster?