Question # 1

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

When sound waves travel from air to water which of these remains constant?

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Velocity

Frequency

Wavelength

All the above

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

Which of the following does not exhibit S.H.M?

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a plucked violin string

a mass attached to a spring

a train shunting between two terminals

a simple pendulum

The characteristic of a body executing S.H.M is that its acceleration is

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inversely proportional to displacement

directly proportional to displacement

independent of displacement

equal to zero

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

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W=Kx_o

W=1/2Kx_o

W=1/2Kx²_o

W=4Kx_o

Sound waves in air always

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Longitudinal

Transverse

Stationary

Electromagnetic

A simple pendulum consists of a

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small light bob

small heavy bob

big light bob

big heavy bob

For a body executing S. H. M, its

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momentum remains constant

potential energy remains constant

kinetic energy remains constant

total energy remains constant

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

Ultra-violet rays differ from X-rays in that they

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Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

The distance covered by the wave in one second is:

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Wave number

Wave length

Frequency

Wave speed

The instantaneous velocity of a body moving along a circle is directed

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along the radius

along the tangent

away from the circle

none of them

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

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longitudinal waves

transverse waves

non-mechanical waves

none of them

Of the following, the option ______ reminds of longitudinal waves.

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Sound waves

Heat waves

Electromagnetic waves

Light waves

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

In solids, only following type/s of wave can travel:

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Transverse

Longitudinal

Both A and B

None of them

The velocity of sound at same temperature is maximum in

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H₂

N₂

O₂

NH₃

The damping depends upon the

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amplitude

sharpness

both of them

none of them

While describing the motion of a simple pendulum, the frictional effects are

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taken into account

completely ignored

partially ignored

none of them

The total energy of spring mass system is

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zero

changing with time

constant

none of them

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

For production of beats the two sources must have

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Different frequencies and same amplitude

Different frequencies

Different frequencies, same amplitude and same phase

Different frequencies and same phase

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

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