Question # 1

A black dull surface is a good ________ of heat:

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Emitter

Absorber

Reflector

Both A and B

Velocity of the body moving in upward direction from the contre of the earth.

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Increases

Decrease

Remain constnat

None of these

Earth revolves around the:

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Moon

Sun

Glaxy

None

1 KW (kilo Watt) is equal to:

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10² W

10³ W

10⁵ W

10⁶W

If the distance is doubled between two masses. The gravitational force will decrease:

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4 times

2 times

One forth

One third

At sea level, the height of mercury column in mercury barometer is approximately:

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72 cm

74 cm

76 cm

78 cm

________ is used to measure the force or weight of a body :

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Physical balance

Spring balance

A and B both

None

Cos 0°=

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0.5

1

0.866

0

Leslie cube have faces:

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2

3

4

5

Land breeze blows from:

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Sea to land drawing night

Sea to land during day

Land to sea during night

Land to sea during day

Which expands on heating?

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Water

Steel

Copper

All are true

The value of g at a height one Earth's radius above the surface of the earth is:

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2g

1/2 g

1/3 g

1/4 g

The S.I unit of power is:

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Newton

Watt

Joule

Coulomb

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