Question # 1

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

The wave form of SHM is.

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Sine wave

Cosine wave

Tangent wave

Square wave

The ballistic missiles are used only for

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Long range

Short range

Medium range

Constant range

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Rate of change of displacement is called

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Speed

Velocity

Kinetic energy

None of these

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with

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mgh

mgx

mg(x-h)

None of these

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

The study of fluid dynamics is

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Easy

Complicated

Impossible

None of these

The mass of a body is quantitative measure of its

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Motion

Inertia

Weight

All of these

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

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Density

Pressure

Temperature

Elasticity

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

The product of cross sectional area of a pipe and speed of fluid along the pipe is

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Zero

Maximum

Constant

Variable

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