Question # 1

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

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Frequency of beat changes with time

Frequency of beat changes with location of observer

All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves

Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

Which of the following changes at an antinode in a stationary wave?

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Density only

Pressure only

Both pressure and density

Neither pressure nor density

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

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

When a wave is travels from one place to another, it transfers:

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Matter

Energy

Momentum

Both B and C

Smaller the damping, greater will be the

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frequency

wavelength

amplitude

none of them

Fidelity refers to

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Reproduction of original sound

Reproduction of original image

Reproduction of music

Reproduction of a CD from original copy

The waves produced in a microwave oven have frequency

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2450 Hz

2450 K Hz

2450 M Hz

2450 G Hz

Fluids can transmit:

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Transverse wave

Compressional wave

Both of them

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 wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

Which one of the following wave motions is transverse:

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Wave motion produced in water when a piece of stone is thrown into it

Pulling of weight hanging vertically with a spiral spring

Both of these

None of these

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

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Stationary waves

Transverse waves

Both of these

None of these

A second's pendulum is a pendulum whose time period is

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1 second

2 seconds

3 seconds

4 seconds

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

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1 : 2

4 : 1

1 : 4

2 : 1

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

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

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Interference

Diffraction

Polarization

Refraction

Si units of time period is

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second

hertz

revolution

vibration/sec

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

The number of vibrating body at any instant from its equilibrium position is called

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displacement

frequency

amplitude

time period

In the resonance condition, the amplitude of the oscillator becomes

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very large

very small

zero

any one of them

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

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Velocity

Frequency

Wavelength

All the above

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

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100 ms^-1

200 ms^-1

450 ms^-1

900 ms^-1

Which of the following is the longitudinal waves?

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Sound waves

Waves on plucked string

Water waves

Light waves

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

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greater than the frequency of applied force

equal to the frequency of applied force

less than the frequency of applied force

all of them

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