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 Physics Questions

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Q:

Velocity of a car does not depend on

A) Speedometer B) Change in direction
C) Change in speed D) Change in acceleration
 
Answer & Explanation Answer: A) Speedometer

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Q:

The unit of power used in industry is

A) Joule B) Watts
C) Horse power D) Kilowatts
 
Answer & Explanation Answer: C) Horse power

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Q:

The rate of change of velocity is called

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

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Q:

What is the SI unit of Charge?

A) Coulomb B) Amperes
C) Watts D) Joules
 
Answer & Explanation Answer: A) Coulomb

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Q:

A man lifts a luggage of 25 kg from the ground and puts it on the head, 2.5 m above the ground. If the value of g = 10 m/s2, then the value of work done by him on the luggage is

A) 22.5 J B) 225 J
C) 625 J D) 220 J
 
Answer & Explanation Answer: C) 625 J

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Q:

Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?

 

A) The cloth completely absorbs red colour wavelength B) It is due to refraction
C) It is the effect of scattering of light D) It is due to Parallax error
 
Answer & Explanation Answer: A) The cloth completely absorbs red colour wavelength

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Q:

Calculate the current flowing through a resistor of 10 ohm when a potential difference of 140 v is applied across it.

A) 14 amp B) 140 amp
C) 1400 amp D) 1.4 amp
 
Answer & Explanation Answer: A) 14 amp

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Q:

If the momentum of a body is tripled, its KE will

A) become three times its original value B) remain the same
C) become six times its original value D) become nine times its original value
 
Answer & Explanation Answer: D) become nine times its original value

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