Question # 1

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

The amplitude of a vibrating body at resonance in vacuum is

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Minimum

Maximum

Zero

Infinite

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

__ will travel faster than other through an optical fibre.

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Ultraviolet light

Visible light

Infrared light

White light

Work has dimension lime

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Torque

Momentum

Velocity

Power

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

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Zero

Mg

2 mg

3 mg

The dimensional unit of impulse is.

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[MLT]

[MLT-1]

[ML-1T-1]

[M-1L-1T-1]

The angular acceleration a =

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The SI unit of angular displacement is.

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Degree

Revolution

Radian

Rotation

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

The resultant of two vectors having magnitude 12 N and 8 N can not be

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2 N

20 N

10 N

16 N

The speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

An ideal reversible heat engine has

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100% efficiency

Highest efficiency

80%

90%

One complete round trip of a body is called

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Displacement

Time period

Vibration

Frequency

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

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