Gravitation (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 29 - 32 of 84

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Question number: 29

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

A satellite is revolving in an orbit close to the earth’s surface. Taking the radius of the earth as 5.8 ⨯ 10 6 meter, the value of the orbital speed and the period of revolution of the satellite will respectively be (g = 9.8 meter/sec 2)

Choices

Choice (4) Response

a.

7.5 km/sec, 8.0 minutes

b.

2.7 km/sec, 8.51 minutes

c.

7.75 km/sec, 80.51 minutes

d.

7.5 km/sec, 80.51 minutes

Question number: 30

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

A satellite has to revolve round the earth in a circular orbit of radius 6 ⨯ 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: 31

» Gravitation » Orbital Velocity of a Satellite

Assertion-Reason▾

Assertion (Ꭺ)

The speed of revolution of an artificial satellite revolving very near the earth is 8 kms -1.

Reason (Ꭱ)

Orbital velocity of a satellite, become independent of height of near satellite.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

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: 32

» Gravitation » Escape Velocity

MCQ▾

Question

Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. Assuming that the radii of the planet and the earth are the same, then –

Choices

Choice (4) Response

a.

b.

c.

d.

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