Question # 1

The value of solar constant.

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1.4 kW m-2

1.0 kW m-2

1.6 kW m-2

2 kw m-2

Newton's laws of motion were published in

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1587

1687

1787

1887

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

A swing is good example of

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Resonance

Vibration

Time period

Oscillation

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

When distance is plotted against the force, it is taken along

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x-axis

y-axis

z-axis

None of these

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

_______ is bio fuel

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Water

Petrol

Ethanol

Oil

Efficiency of steam locomotive is.

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8%

10%

9%

7%

No of spark plugs needed in the diesel engine are.

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0

1

2

3

Increase in speed of sound for 1 ^oC rise in temperature is.

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0.61 ms-1

0.61 cms-1

61 ms-1

6.1 ms-1

The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

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A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

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