999+ Physics Questions Answers Explanation MCQ

Q:

Which of the following has highest penetration power?

A) α– radiations	B) β– radiations
C) γ– radiations	D) All have same penetration power.

Answer & Explanation Answer: C) γ– radiations

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Q:

According to Rutherford the radius of the nucleus is about ______ than the radius of the atom.

A) 105 times greater	B) 105 times lesser
C) 109 times greater	D) 107 times greater

Answer & Explanation Answer: B) 105 times lesser

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Q:

Match the following with the correct response.

(1) W	(A) Nm
(2) kW	(B) $3.6 x 10^{6} J$
(3) 1 kW-h	(C) 1000 W
(4) 1 HP	(D) 746 W

A) 1-D, 2-B, 3-C, 4-A	B) 1-A, 2-B, 3-C, 4-D
C) 1-A, 2-C, 3-D, 4-B	D) 1-A, 2-C, 3-B, 4-D

Answer & Explanation Answer: D) 1-A, 2-C, 3-B, 4-D

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Q:

How many millimeters make ten kilometers?

A) 1010	B) 109
C) 108	D) 107

Answer & Explanation Answer: D) 107

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Q:

The gravitational force of attraction between two bodies is __________________ the product of their masses.

A) directly proportional to the square of	B) inversely proportional to
C) inversely proportional to the square of	D) directly proportional to

Answer & Explanation Answer: D) directly proportional to

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Q:

In Force equation, F is equal to

A) ma	B) mv
C) u+at	D) mgh

Answer & Explanation Answer: A) ma

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Q:

The power of _____________ is expressed in terms of a magnitude on a scale called Richter scale.

A) a tornado	B) a volcano
C) an earthquake	D) a thunderstorm

Answer & Explanation Answer: C) an earthquake

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Q:

The product of mass of a body and the acceleration produced in it equals the ___________ acting on it.

A) force	B) impulse
C) torque	D) kinetic energy

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