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 Physics Questions

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Q:

While watching 3D movies at the theater, we have to wear special glasses because?

A) The glasses allow our left and right eyes to see different images B) 3-D movies use special colors which cannot be sensed by the human eye
C) 3-D movies are brighter than ordinary movies and can hurt our eyes if seen directly D) The glasses allow both the eyes to see similar images
 
Answer & Explanation Answer: A) The glasses allow our left and right eyes to see different images

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1 1016
Q:

While releasing the arrow from a stretched bow, the PE of the bow is converted into?

A) chemical energy B) kinetic energy
C) sound energy D) heat energy
 
Answer & Explanation Answer: B) kinetic energy

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3 1016
Q:

As per Newton's law of gravitation, the force between two bodies is ________.

A) directly proportional to the product of their masses B) directly proportional to the distance between them
C) directly proportional to the product of their radius D) directly proportional to the product of forces
 
Answer & Explanation Answer: A) directly proportional to the product of their masses

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1 1015
Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is _________________.

A) g/4 B) g/2
C) 4g D) 2g
 
Answer & Explanation Answer: A) g/4

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0 1014
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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3 1012
Q:

When body is accelerated--

A) Its velocity never changes. B) Its speed will always change.
C) Its direction always changes. D) Its speed may or may not change.
 
Answer & Explanation Answer: D) Its speed may or may not change.

Explanation:

Uniform circular motion, that is constant speed along a circular path, is an example of a body experiencing acceleration resulting in velocity of a constant magnitude but the change of direction

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1 1011
Q:

In _____________ motion of a body its velocity varies with time.

A) uniform B) linear
C) equilibrium D) non-uniform
 
Answer & Explanation Answer: D) non-uniform

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0 1009
Q:

The instrument used to determine the rotation speed of a shaft is called

A) Speedometer B) Tachometer
C) Anemometer D) Chronometer
 
Answer & Explanation Answer: B) Tachometer

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