Question # 1

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

Which one of the following force cannot do any work on the particle on which it acts.

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Fractional force

Gravitational force

Electrostatic force

Centripetal force

The dimension of viscosity are

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[M2L-2T2]

[M-1LT-1]

[M-1L-1T]

[ML-1T-1]

Angular frequency is the characteristic of

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Linear motion

Vibratory motion

Circular motion

All of these

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

If amplitude of a simple pendulum is increased by 4 times the time period will be.

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Four times

Half

Same

Two times

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

The phenomenon of polarization of light reveals that sun light is

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Longitudinal waves

Transverse wave

Electromagnetic waves

Monochromatic wave

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

The moment of inertia is analogue to

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Mass

Weight

Torque

Force

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

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