999+ Physics Questions Answers Explanation MCQ

Q:

Choose the most appropriate answer:Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?

A) Scattering	B) Diffraction
C) Interference	D) Polarization

Answer & Explanation Answer: A) Scattering

Explanation:

The Nobel Prize in Physics 1930 was awarded to Sir Chandrasekhara Venkata Raman "for his work on the scattering of light and for the discovery of the effect named after him".

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1 1882

Q:

Which one of the following physical quantities has the same dimensions as that of Planck’s constant h?

A) Linear momentum	B) Angular momentum
C) Force	D) Potential energy

Answer & Explanation Answer: B) Angular momentum

Explanation:

In S.I. System unit of angular momentum is "joule.Second".

SI unit of Planck's constant is joule-seconds(j-s).

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1 1881

Q:

If electric resistance is to be decreased, then the number of resistances should be connected in ________________

A) Series	B) Parallel
C) Mixed arrangement	D) None of these

Answer & Explanation Answer: B) Parallel

Explanation:

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0 1879

Q:

Which electromagnetic wave has the highest frequency?

A) Gamma Rays	B) Radio waves
C) X rays	D) Microwaves

Answer & Explanation Answer: A) Gamma Rays

Explanation:

In all Electromagnetic waves, Gamma Rays have the highest frequency and the lowest wavelength. Whereas Radio ways have lowest Frequency and the highest wavelength.

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0 1874

Q:

Which among the following is a vector quantity?

A) Heat	B) Angular momentum
C) Work	D) Time

Answer & Explanation Answer: B) Angular momentum

Explanation:

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0 1872

Q:

The strain produced in a body is directly proportional to the stress applied on it, is called _______.

A) Dollar's law	B) Hooke's law
C) Miller's law	D) Kepler's law

Answer & Explanation Answer: B) Hooke's law

Explanation:

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1 1871

Q:

What is the resistance (in ohm) of an electrical component if a current of 0.5 A passes through it on application of 20 V of potential difference across it?

A) 10	B) 20
C) 80	D) 40

Answer & Explanation Answer: D) 40

Explanation:

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1 1869

Q:

What is the other name of Galileo's law of falling bodies?

A) Law of motion	B) Newton's first law
C) Newton's second law	D) Newton's third law

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