Question # 1

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

Velocity of sound in any medium deepness upon.

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Elasticity

Density

Volume

Mass

The frequency of the fundamental mode of transverse vibration of a stretched wire 1,000 mm long is 256 Hz When the wire is shortened to 400 mm at the same tension

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640 Hz

680 Hz

720 Hz

780 Hz

The fact that the edge of a shadow formed by a point source of light shining on an object is not sharp is an example of.

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Refraction

Diffraction

Polarization

Dispersion

Frequency less than 120 Hz are known as

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Infrasonic

Ultra sonics

Super sonics

Infrared

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

Which of the following refers to the distance from crest to crest of a wave.

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Frequency

Wavelength

Amplitude

Period

Reverberation is the

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Presence of large number of overtones

presence of harsh and discordant notes

Presence of ultrasonic vibrations

Persistence of audible sound after the source has stopped

Echoes arise from

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Reflection

Refraction

Diffraction

Dispersion of sound waves

The velocity of the wave could be increased by

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Reducing the amplitude

Decreasing the frequency

Increasing the period

Stretching the spring more

A wave which consists of a single, non repetitive disturbance is called a

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Continous wave

Pulse

Longitudinal wave

Transverse wave

A wave reflected from the boundary of a denser medium will have phase change

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45 ^o

60^o

90 ^o

180 ^o

Any frequency higher than the fundamental frequency of a sound is known as.

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Overtone

Beat

Acoustics

Shockwaves

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

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Velocity

Displacement

Amplitude

Phase

On which parameter the path difference between two interfering waves depends upon.

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Amplitude

Pitch

Intensity

Phase angle

Soap film in sunlight appears coloured due to

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Dispersion of light

Diffraction of light

Scattering of light

Interference of light

Which of the following medium can transmit both transverse and longitudinal waves.

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Solid

Gas

Liquid

Plasma

In which of the following the speed of sound will be maximum under similar conditions.

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N2

O2

CO2

H2

Hearing damage is possible at sound pressure of

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0 dB

50 dB

130 dB

195 dB

If a wave vibrates 10 times in one second with a speed of 10 m s-1 the wavelength will be.

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1 m

10 m

20 m

100 m

Longitudinal waves cannot be

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Reflected

Difracted

Dispersed

Polarized

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