Gravitation (NEET Physics): Questions 19 - 22 of 82

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Question number: 19

» Gravitation » Gravitational Potential

Assertion-Reason▾

Assertion (Ꭺ)

Gravitational potential of earth at every place on it is negative.

Reason (Ꭱ)

Everybody on earth is bound by the attraction of earth.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are false
d. Ꭺ is true but Ꭱ is false

Question number: 20

» Gravitation » Gravitational Acceleration

MCQ▾

Question

Two planets of radii in the ratio 1: 2 are made from the materials of density in the ratio 3: 1. Then the ratio of acceleration due to gravity g 1 /g 2 at the surface of two planets will be

Choices

Choice (4) Response
a.

32

b.

25

c.

23

d.

1

Question number: 21

» Gravitation » Energy

Assertion-Reason▾

Assertion (Ꭺ)

If an earth satellite moves to a lower orbit, there is some dissipation of energy but the speed of gravitational satellite increases.

Reason (Ꭱ)

The speed of satellite is a constant quantity.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Ꭺ is false but Ꭱ is true
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 22

» Gravitation » Kepler's Laws of Planetary Motion

MCQ▾

Question

The Jupiter’s period of revolution round the Sun is 12 times that of the Earth. Assuming the planetary orbits are circular, how many times the distance between the Jupiter and Sun exceeds that between the Earth and the sun.

Choices

Choice (4) Response
a.

5.242

b.

3.242

c.

2.242

d.

4.242

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