Physics Questions

Q:

A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

A) 40 B) 10
C) 20 D) 80
 
Answer & Explanation Answer: B) 10

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1 2046
Q:

What is the unit of the physical quantity "Jerk"?

A) meter second B) meter per second cube
C) meter per second square D) meter per second
 
Answer & Explanation Answer: B) meter per second cube

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Q:

Bending of light rays in denser medium is termed as:

A) Reflection B) Dispersion
C) Refraction D) Deflection
 
Answer & Explanation Answer: C) Refraction

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Q:

What is the minimum distance (in metres) required to hear an echo?

A) 10 B) 13
C) 17 D) 21
 
Answer & Explanation Answer: C) 17

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Q:

Temperature of distant luminous bodies can be determined by

A) Mercury thermometers B) Gas thermometers
C) Pyrometers D) Colour thermometers
 
Answer & Explanation Answer: C) Pyrometers

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1 2035
Q:

A bullet of mass 10gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun.

A) 2 B) 0.1
C) 4 D) 0.05
 
Answer & Explanation Answer: D) 0.05

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Q:

The strength of a force is usually expressed by its __________.

A) Motion B) Direction
C) Interaction D) Magnitude
 
Answer & Explanation Answer: D) Magnitude

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Q:

Calculate the time period (in seconds) of a sound wave of wavelength 2m travelling with a speed of 250 m/s.

A) 500 B) 0.008
C) 0.016 D) 250
 
Answer & Explanation Answer: B) 0.008

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