Question # 1

Due to _____________ we can watch live programs.

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Natural Satellite

Antenna

Artificial satellite

Nil

The altitude of geostationary orbits in which communication satellites are launched above the surface of the earth is;

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850 km

1000 km

6400 km

42300 km

The mass of Earth is

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6 x 1018 kg

6 x 1020 kg

6 x 1022 kg

6 x 1024 kg

Speed of the satellites of GPS around earth is:

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3.87 ms^-1

387 kms^-1

3.87 kms^-1

38.7 kms^-1

Moon is nearly _________ km away from earth.

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6 x 10²⁴

380000

199.62 km

30000

The orbital velocity of a satellite revolving at height 'h' above the surface of Earth is given by

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Moon is our satellite:

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Artificial

Permanent

Natural

Communication

Weight of the body is__________ to the gravity force between body and earth:

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Less than

Greater than

Equal

Constant

Value of g on mercury is ___________ ms^-2.

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25.94

3.7

8.87

1.62

The first man who gave the idea of gravity:

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Hero

Einstein

Newton

Faraday

A satellite revolving around very close to Earth has speed nearly:

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8 kms^-1

5 kms^-1

10 kms^-1

100 kms^-1

The Earth attracts a body with a force equal to its:

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Velocity

Gravity

Weight

Mass

The gravitational field exist _________ the earth.

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One direction

Upward

All aorund

Downward

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