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Q:

Which is the strongest force in the universe?

Answer

Nuclear Force

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Subject: Physics

Q:

Which is the weakest force in the universe?

Answer

Gravitational Force

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Subject: Physics

Q:

What is refractive index ?

A) it is defined as the ratio of speed of light in the medium to the speed of light in vacuum. B) it is defined as the product of speed of light in medium and in vacuum.
C) it is defined as the ratio of speed of light in vacuum to the speed of light in the medium . D) None of above
 
Answer & Explanation Answer: C) it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .

Explanation:
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Q:

If lift is going up with acceleration, the apparent weight of a body is

A) may be more or less than true weight B) more than the true weight
C) less than the true weight D) equal to the true weight
 
Answer & Explanation Answer: B) more than the true weight

Explanation:
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Q:

What is unit of Astronomical distance ?

A) light year B) angstrom
C) weber D) lux
 
Answer & Explanation Answer: A) light year

Explanation:

angstrom is used to measure wave length,

weber is used to measure Magnetic flux,

lux is used to measure Intensity of illumination.

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Q:

Scalar Quantities are

A) physical quantities which have magnitude only and no direction B) physical quantities which have no magnitude only and only direction
C) physical quantities which have magnitude only and direction D) physical quantities which have no magnitude and no direction
 
Answer & Explanation Answer: A) physical quantities which have magnitude only and no direction

Explanation:
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Q:

Which law is also called law of inertia ?

A) Newton first law B) Newton second law
C) Newton third law D) All of above
 
Answer & Explanation Answer: A) Newton first law

Explanation:
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Q:

The rotational effect of a force on a body about an axis of rotation is described in terms of

A) Centre of gravity B) Centripetal force
C) Centrifugal force D) Moment of force
 
Answer & Explanation Answer: D) Moment of force

Explanation:
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