A longitudinal wave is produced on a toy slinky. The wave travels at a speed of 30 cm s and the frequency of the wave is 20 Hz . What is the maximum distance between the consecutive compressions of the slinky?

Given, Wave velocity, v = 30 cm s Frequency, f = 20 Hz We know that, v = f × λ ⇒ λ = v f ⇒ 30 20 = 1 . 5 cm The maximum distance between the consecutive compressions which is nothing but wavelength is 1 . 5 cm .

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The number of such oscillations per unit time is the ______________ of the sound wave.

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Important Questions on Sound

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Science>Physics>Sound>Characteristics of Vibrations

If the speed of wave is

250 m / s

and its wavelength is

50 cm

then the frequency will be:

EASY

Science>Physics>Sound>Characteristics of Vibrations

The frequency of radio waves from a certain radio station is

600 KHz

. Its wavelength is

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Science>Physics>Sound>Characteristics of Vibrations

The velocity of sound wave in a given medium is

V

when its frequency is

ν

. The velocity, when the frequency changes to

5 ν

is :

MEDIUM

Science>Physics>Sound>Characteristics of Vibrations

The given graph shows the displacement versus time relation for a disturbance travelling with velocity $1500 m / s$ . The wavelength of the disturbance will be

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HARD

Science>Physics>Sound>Characteristics of Vibrations

A ball is moving uniformly in a circular path of radius

1 m

with a time period of

1.5 s

. If the ball is suddenly stopped at

t = 8.3 s,

the magnitude of the displacement of the ball with respect to its position at

t = 0 s

is closest to:

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Science>Physics>Sound>Characteristics of Vibrations

When sound is refracted from air to water, which of the following will remain unchanged?

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Science>Physics>Sound>Characteristics of Vibrations

Consider the following statements and select the correct alternative: Statement (A): The frequency of the sound wave whose wave length is

1.5 cm

with speed

339 m / s

22600 Hz

. Statement (B): The given sound is audible to human beings.

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Science>Physics>Sound>Characteristics of Vibrations

If the speed of wave is

350 m / s

and its wavelength is

100 cm

then the frequency of the wave will be

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Science>Physics>Sound>Characteristics of Vibrations

On an average, a human heart is found to beat

72

times a minute. Its frequency and period are

HARD

Science>Physics>Sound>Characteristics of Vibrations

A point particle is acted upon by a restoring force

- k x^{3} .

The time period of oscillation is

T

when the amplitude is

A .

The time period for an amplitude

2 A

will be:

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Science>Physics>Sound>Characteristics of Vibrations

The speed of a wave in a medium is

760 {ms}^{- 1}

.If

3600

waves are passing through a point in the medium in

2

minutes then its wavelength is

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Science>Physics>Sound>Characteristics of Vibrations

A simple wave motion is represented by $y = 5 (\sin 4 π t + \sqrt{3} \cos 4 π t)$ . Its amplitude is

HARD

Science>Physics>Sound>Characteristics of Vibrations

For the wave shown in figure, calculate the frequency and wave length of the wave if its speed is 320 ms–1.

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MEDIUM

Science>Physics>Sound>Characteristics of Vibrations

What are acoustically measurable quantities related to pitch and loudness?

MEDIUM

Science>Physics>Sound>Characteristics of Vibrations

A transverse wave travels on a taut steel wire with a velocity of

v

when tension in it is

2.06 \times 10^{4} N .

When the tension is changed to

T,

the velocity changed to

\frac{v}{2} .

The value of

T

is close to:

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Science>Physics>Sound>Characteristics of Vibrations

The figure below shows pressure variation in two different sound waves in air with time at a given position. Both the figures are drawn to the same scale.

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Which of the following statement is true?