Physics Questions

Q:

A transformer can do all of the following except

A) step­-up a/c voltage B) step­-up a/c current
C) step­-up a/c power D) step­-down a/c voltage
 
Answer & Explanation Answer: C) step­-up a/c power

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Q:

An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's

A) First law B) Second law
C) Third law D) Fourth law
 
Answer & Explanation Answer: A) First law

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Q:

_____ is same on every point on a rotating body.

A) Linear velocity B) Linear momentum
C) Angular torque D) Angular velocity
 
Answer & Explanation Answer: D) Angular velocity

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Q:

For every action, there is an equal and opposite reaction, is Newton's

A) First law B) Second law
C) Third law D) Fourth law
 
Answer & Explanation Answer: C) Third law

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Q:

If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

A) Concave B) Convex
C) Cylindrical D) Plane
 
Answer & Explanation Answer: A) Concave

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Q:

During _____________ motion of an object along a straight line, the velocity remains constant with time.

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

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Q:

Why does a cannon recoil after firing ?

A) Conservation of energy B) Backward thrust of gases produced
C) Newton's third law of motion D) Newton's first law of motion
 
Answer & Explanation Answer: C) Newton's third law of motion

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Q:

The path of a projectile is called its ______.

A) Altitude B) Range
C) Trajectory D) Flight
 
Answer & Explanation Answer: C) Trajectory

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