Question # 1

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

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the driving force is large

the driving force is zero

the driving force may be feeble

all of them

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

Si units of time period is

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second

hertz

revolution

vibration/sec

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

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

For transmission of both transverse and longitudinal waves, we can use:

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Solid

Gas

Plasma

None of these

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

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displacement

frequency

amplitude

time period

The velocity of sound in air depends upon

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Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

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

In the same medium, velocity of the wave:

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Goes on increasing

Remains constant

Goes on decreasing

None of these

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

Longitudinal waves are also called:

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Congressional waves

Transverse waves

Radio waves

None of them

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