Physics Questions

Q:

The reflection formed by the plane mirror is ________________.

A) vertical inversion B) a real image
C) lateral inversion D) an enlarged image
 
Answer & Explanation Answer: C) lateral inversion

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Q:

The work done by centripetal force is ______.

A) positive B) zero
C) negative D) unity
 
Answer & Explanation Answer: B) zero

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Q:

Choose the most appropriate answer:Natural radioactivity was discovered by

A) Marie Curie B) Earnest Rutherford
C) Henry Bacquerel D) Enrico Fermi
 
Answer & Explanation Answer: C) Henry Bacquerel

Explanation:

Natural radioactivity was discovered by Henri Bacquerel.

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Q:

Find the acceleration (in m/s2) of a body which accelerates from 25 m/s to 30 m/s in 10 seconds

A) 5.5 B) 1
C) 11 D) 0.5
 
Answer & Explanation Answer: D) 0.5

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Q:

What does the slope of a velocity time graph represent?

A) Acceleration B) Distance
C) Speed D) Momentum
 
Answer & Explanation Answer: A) Acceleration

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Q:

Optical fiber works on the principle of -

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

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Q:

Optical fibre works on which of the following principle of light?

A) Reflection B) Refraction
C) Diffraction D) Total internal reflection
 
Answer & Explanation Answer: D) Total internal reflection

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Q:

A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is

A) 680 m B) 720 m
C) 800 m D) 700 m
 
Answer & Explanation Answer: B) 720 m

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