# Physics MCQs for Uttar Pradesh PSC Exam Part 9

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Question:

Luminous flux is expressed in

1. Lumen
2. Candela
3. Weber
4. Lue

Question:

Light travels through a glass plate of thickness d. If n is the refractive index of glass and c is the velocity of light in vacuum, the time taken by light to travel through the glass plate is

Question:

What is the magnification when an object is placed at 2f of a convex mirror?

Question:

A tank is filled with water up to a height of . The apparent depth of a needle at the bottom of the tank is

Question:

A man under water in a lake is viewing a boy standing on the bank of the lake. Then for him the boy appears to be

1. Shorter
2. Taller
3. Of the sane size
4. 16 cm

Question:

A convex mirror placed at a distance of from a candle forms a virtual image at the same position as that formed by a plane mirror at a distance of from the candle. What is the focal length of the convex mirror?

Question:

When light travels from 1 medium to another that remains unaltered is

1. Speed
2. Wave length
3. Frequency
4. Intensity

Question:

The length of a telescope is and magnification is 19. The focal length of the objective and eye piece are

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