# Gravitation (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 16 - 20 of 84

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## Question number: 16

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

### Question

A satellite has to revolve round the earth in a circular orbit of radius 8 ⨯ 10 3 km. The velocity of projection of the satellite in this orbit will be -

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 17

» Gravitation » Kepler's Laws of Planetary Motion

MCQ▾

### Question

The Jupiter s period of revolution round the Sun is 10 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.

2.242

c.

4.641

d.

4.242

## Question number: 18

» Gravitation » Escape Velocity

MCQ▾

### Question

Acceleration due to gravity on a planet is 12 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. The ratio of the radii of the planet and the earth is 2: 1, then –

### Choices

Choice (4) Response

a.

b.

c.

d.

## 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.

b.

c.

d.

1

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