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Q:

Due to an acceleration of 4 m/s2 the velocity of a body increases from 10 m/s to 30 m/s in a certain period. Find the displacement (in m) of the body in that period.

A) 200 B) 250
C) 100 D) 125
 
Answer & Explanation Answer: C) 100

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Q:

What is the direction of torque?

A) Perpendicular to the direction of applied force B) Same as the direction of applied force
C) Opposite to the direction of applied force D) Parallel to the radius
 
Answer & Explanation Answer: A) Perpendicular to the direction of applied force

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Q:

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.

A) greater than the weight when the person is stationary B) twice the weight when the person is stationary
C) less than the weight when the person is stationary D) same as the weight when the person is stationary
 
Answer & Explanation Answer: C) less than the weight when the person is stationary

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Q:

Heavy water is mostly used in which of the following?

A) In fire extinguisher B) In nuclear reactors
C) In washing cloth D) In both Nuclear reactors and Fire extinguisher
 
Answer & Explanation Answer: B) In nuclear reactors

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Q:

Instrument for measuring low temperatures is called

A) Diagometer B) Cryometer
C) Chromatoptometer D) Cymometer
 
Answer & Explanation Answer: D) Cymometer

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Q:

Why is weightlessness experienced while orbiting the earth in space ships ?

A) Inertia B) Acceleration
C) Zero gravity D) Orbital motion
 
Answer & Explanation Answer: C) Zero gravity

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Q:

Which of the following is an example of thermoplastics?

A) Bakelite B) Melamine
C) PVC D) No option is correct
 
Answer & Explanation Answer: C) PVC

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Q:

A body has a weight W on the surface of Earth. What is its weight on a planet whose mass is 15 times that of Earth and a radius that is 4 times that of the earth?

A) 15/4 W B) 16/9 W
C) 16/7 W D) 16/15 W
 
Answer & Explanation Answer: D) 16/15 W

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