Question # 1

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

Hot igneous rocks, usually in molten or partly molten state are found in the depth of

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5 km

10 km

15 km

20 km

The value of a time period of allow flying satellite is

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1 year

84 minutes

28 hours

1 day

The resultant of two vectors having magnitude 10 N and 8 N Can not be

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2 N

9 N

18 N

20 N

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

The unit of energy is same as that of

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Power

Work

Torque

Density

According to Hygen's principle, each point on a wave front acts as a source of.

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Secondary wavelet

New wave front

Sound

Primary wavelet

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

The SI unit of angular displacement is.

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Degree

Revolution

Radian

Rotation

One revolution is equal to.

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90^o

180^o

360^o

270^o

In the absence of external force, the change in momentum is.

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Zero

Constant

Decreasing

Increasing

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

The work done is isochoric process is.

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Constant

Variable

Zero

Depend upon condition

Salter's duck was invented by

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Newton

Einstein

Prof Salter

Maxwell

If the time period of simple pendulum is 2 seconds its frequency will be.

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1 Hz

0.5 Hz

1.5 Hz

2 Hz

For an ideal gas, the internal energy is directly proportional to.

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Pressure

volume

Mass

Temperature

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