Question # 1

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

When the stress crosses the elastic limit, then the body will :

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Break

Permanently deformed

Plasticity

None

The value of gravitational acceleration when a body is moving in downward direction is.

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10 ms^-1

10 ms^-2

10 m

-10 ms

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

The unit of velocity and speed is.

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ms

ms^-2

ms^-1

ms-3

Shining silvered surface is a best:

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Emitter

Absorber

Reflector

None of these

From following, which one is a renewable source of energy?

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Coal

Gas

Sunlight

Petrolum

P.E is equal to:

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mgh

1/2 mv²

W x F

None of these

Distance covered by freely falling downward body in first second.

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5 m

29.4 m

10 m

19.6 m

Leslie's cube is a box of:

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Metal

Non-Metal

Wood

Metalloids

A ball of mass 1 kg moving with velocity 2 ms-1, Its momentum will be

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1 Ns

2 Ns

0.5 Ns

4 Ns

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

Graph is plotted between ........ variable.

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1

2

3

4

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