Question # 1

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

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longitudinal waves

transverse waves

non-mechanical waves

none of them

The total energy of spring mass system is

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zero

changing with time

constant

none of them

A wave, which transfer energy by moving away from the source of disturbance is called a

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progressive wave

travelling wave

both of them

none of them

When the bob of simple pendulum is at mean position, its K.E will be

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maximum

minimum

zero

all of them

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

If the time period a simple pendulum is 2 s, its frequency would be

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2 Hz

1.5 Hz

1.0 Hz

0.5 Hz

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

Which of the following is the longitudinal waves?

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Sound waves

Waves on plucked string

Water waves

Light waves

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

The portion of the water above its mean level forms a:

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Crest

Trough

Both A and B

None of these

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

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its weight

tension in the string

viscous drag force by air

all of them

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

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Longitudinal wave

Transverse wave

No vibration at all

None of them

The square of 0.4 is:

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Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

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