Question # 1

The speed of bodies exceeding the speed of sound is called.

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Superesonic

Ultrasonic

Infrasonic

Super fast

Sound wave do not travel in vacuum because.

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they are transverse waves

They are stationary waves

They require material medium for propagation

They do not have enough energy

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

When a monochromatic wave enters from one medium into another the property that remains unchanged.

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Amplitude

Velocity

Frequency

Nature of the wave

The wavelength is the distance along the line of wave propagation between two successive particles which have equal

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Velocities

Phases

Amplitude

Displacements

Huygen's wave theory falls to explain

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Diffraction

polarization

Interference

Refraction

In case of stationary waves every particle of the medium has fixed

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Velocity

Displacement

Amplitude

Phase

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

The unit of intensity of sound waves is.

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W m-1

W m-2

N m-1

N m-2

If Young's experiment is performed in water. which of the following change will occur.

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Fringe width will increases

Fringe width will decreases

Fringe width will remain unchanged

No fringe will be seen

Velocity of sound in air at a given temperature.

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Increases with increase in pressure

Decrease with increases in pressure

Is independent of pressure

Becomes quadruples

With the increase of temperature, teh pitch of an organ pipe

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Increase

Descrease

Remain the same

May increase or decrease

LASER beam can be used to generate three dimensional images objects in the process called.

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Tomography

Holography

Autography

Biography

A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2%

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980 Hz

1,000 Hz

1,010 Hz

1,020 Hz

In the experiment of production od x rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of currrent

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

When sound waves enter a different medium the quantity that remains unchanged a.

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Wavelength

Speed

frequency

Intensity

In a diffraction pattern, the width of any fringe is.

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Directly proportional to slit width

Inversely proportional to slit width

independent of slit width

Zero

The locus of all points in a medium having the same phase of vibration is called.

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Creast

trough

Wavelength

Wave front

Polarization is characteristic of.

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Light wave

sound waves

Waver waves

x-rays

A water wave is an example of

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Electromagnetic wave

Longitudinal wave

Transverse wave

Reverberation

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