Question # 1

The speed of sound in the air at one atmospheric pressure at room temperature is:

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343 ms-1

346 ms-1

349 ms-1

339 ms-1

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

The advantages of electronic mail are:

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Fast communication

Cost free service

More efficient

All of these

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave:

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Two times

Equal

Four times

Half

If the intensity of faintest audible sound is Io and of another sound is I then sound level will be:

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K log Io/I

Log Io/I 2K

K log Io/I2

K log I/Io

Micro waves are used in:

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Radio

Television

Mobile phone

All of these

The product of frequency and time period is equal to:

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v

0

1

L

The example of shock absorber of the vehicles are:

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Simple harmonic motion

Vibratory motion

Damped motion

Linear motion

The oscillations of a system in the presence of which force are called damp oscillations:

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Resistive force

Attractive force

Coulomb force

Both a and b

The product of frequency and wavelength is equal to:

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Time period

Amplitude

Wave speed

Wave energy

The distance between two consecutive compressions or rarefactions in longitudinal waves is called:

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Amplitude

Wavelength

Half wavelength

1/4 wavelength

In simple pendulum motion, restoring force is provided by:

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Air resistance

Tension in the string

Inertia

Weight of the body

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10th Class Physics Chapter 11 Sound English Medium KPK Boards Online Mcqs MCQs With Answers

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