Physics Questions

Q:

Which of the following does NOT contribute to sparkling of diamonds?

A) Total Internal Reflection B) High Refractive Index of Diamonds
C) Dispersion D) Low Refractive Index of Diamonds
 
Answer & Explanation Answer: D) Low Refractive Index of Diamonds

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Q:

The speed of the light is maximum in

A) Air B) Vacuum
C) Water D) Glass
 
Answer & Explanation Answer: B) Vacuum

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Q:

_______________ states that the ratio of the potential difference across a conductor to the current flowing through it, is a constant, provided that its physical conditions, such as temperature, remain constant.

A) Lenz's Law B) Hooke's Law
C) Ohm's Law D) The coulomb's law
 
Answer & Explanation Answer: C) Ohm's Law

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Q:

A lens has a power +2.0 D. The type of lens and its focal length will be

A) Concave, -0.5 m B) Convex, 0.5 m
C) Concave, 0.5 m D) Convex, -0.5 m
 
Answer & Explanation Answer: B) Convex, 0.5 m

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Q:

If the velocity of a body becomes two times its initial velocity, its kinetic energy becomes n times its initial kinetic energy. What is the value of n?

A) 4 B) 6
C) 1/2 D) 3
 
Answer & Explanation Answer: A) 4

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Q:

Knife is an example for

A) Lever B) Wedge
C) Inclined plane D) Pulley
 
Answer & Explanation Answer: B) Wedge

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Q:

Which of the following is NOT an example of potential energy?

A) Running water B) Water stored in a dam
C) A raised hammer D) A compressed spring
 
Answer & Explanation Answer: A) Running water

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Q:

Mirages are formed primarily due to ___ of light.

A) Reflection B) Diffusion
C) Refraction D) Scattering
 
Answer & Explanation Answer: C) Refraction

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