Physics Questions

Q:

If a body moves with a uniform speed in a circular motion, then______.

A) its acceleration is increasing B) its acceleration is zero
C) its velocity is changing D) its velocity is uniform
 
Answer & Explanation Answer: C) its velocity is changing

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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:

Find the position of the image formed by a concave mirror when the object is placed between P and F?

A) At infinity B) Between F and C
C) Behind the mirror D) Beyond C
 
Answer & Explanation Answer: C) Behind the mirror

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Q:

What is the unit of the physical quantity, Illuminance?

A) siemens B) tesla
C) lux D) weber
 
Answer & Explanation Answer: C) lux

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Q:

What type of force acts on a car moving around a curve?

A) Centrifugal force B) Cohesive force
C) Centripetal force D) Gravitational force
 
Answer & Explanation Answer: C) Centripetal force

Explanation:

It is a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving is called as Centripetal force.

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Q:

Kinetic energy depends on

A) the velocity or speed of the moving body. B) the mass of the moving body
C) the pressure of the moving body D) both mass and velocity of the moving body
 
Answer & Explanation Answer: D) both mass and velocity of the moving body

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Q:

To convert temperature from Celcius to Kelvin scale, you must ___ the given temperature.

A) subtract 273 B) multiply 273
C) add 273 D) divide by 273
 
Answer & Explanation Answer: C) add 273

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Q:

During uniform motion of an object along a straight line, its ___________ remains constant with time

A) acceleration B) deceleration
C) force D) velocity
 
Answer & Explanation Answer: D) velocity

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