Question # 1

Pitch of the sound determines

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Its shrillness

Loudness of sund

Intensity level

Quality of sound

The distance between any two consecutive bright or dark fringes is called.

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Wavelength

Amplitude

Fringe spacing

Wavelet

Which of the following properties of sound is affected by change in air temperature.

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Amplitude

Intensity

Frequency

Wavelength

All particles, of a wave front vibrate

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In same phase

In opposite phase

Upward down

Left and right

A application of the phenomenon of polarization is in

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The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

Two tuning forks have same natural frequency One of them is now loaded with wax. When both the forks are sounded together the will

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Produce interference

Produce vibrations

Remain in resonance

Produce beats

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

The central ring is bright in case of Newton's rigs produced by

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Reflection

Wedges

Refraction

Transmission

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

When wind blows in the same direction in which the sound travels, the sound velocity

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Decreases

Increases

Remains unchanged

Becomes zero

Which physical properties is most responsible for resonance.

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Frequency

Intensity

Pitch

Loundness

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

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Superesonic

Ultrasonic

Infrasonic

Super fast

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

Which of the following gives discrete emission spectrum.

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Sun

Candle

Incandescent filament

Mercury vapour lamp

Beats are the results of.

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Diffraction of sound waves

Interference

Polarization

Timber

What will be the effect on the speed of a Transerv wave in a string. If tension is made 4 times.

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Remains the same

Increase a times

Becomes double

Becomes 3 times

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

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Amplitude

Pitch

Intensity

Phase angle

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 interference between two sounds of slightly differed frequency is

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shock wave

Beats

Sonic boom

Doppler's effect

Which of the following is a method of energy transfer.

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Conduction

Wave motion

Radiation

All of these

The quality of sound

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Decreases with pitch

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones present there

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