Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 1

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The equation of plane progressive wave is $y = 20 \sin (100 π t - 2 π x) .$ The velocity of medium particle at $x = \frac{1}{6}$ and at $t = 0$ is [All units are in $CGS$ ]

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Important Questions on Waves

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 2

A transverse wave is represented by the equation

y = y_{0} \sin 2 π [f t - \frac{x}{λ}] .

If maximum particle velocity is half of the wave velocity, then

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 3

A uniform rope hangs vertically from the ceiling. A transverse pulse is produced at the lower most end which travels upward. The acceleration a of the pulse with distance

x

from the lower end varies as

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 4

The fundamental frequency of a stretched string increases by

20 Hz

, when its tension is increased by

69 %

. Initial fundamental frequency of string is

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 5

Two coherent waves represented by

y_{1} = A \cos (ω t - k x)

and

y_{2} = A \cos (ω t - k x + \frac{π}{3})

are superimposed. The amplitude of resultant wave is

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 7

Sound wave travels with speed at

330 {ms}^{- 1}

through air and with speed

1650 {ms}^{- 1}

through a liquid. The wavelength of a

990 Hz

acoustic wave as it enters in liquid from air

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 8

If two sound waves represented by

y_{1} = 10 \sin (1020 π t - π x)

and

y_{2} = 10 \sin (1004 π t - π x)

are superposed at

x = 0

, then beat frequency is

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 9

In a resonance column tube,

1^{st}

and

2^{nd}

resonances occurred at

24 cm

and

72.6 cm .

What is the radius of the tube is. (velocity of sound

= 330 {ms}^{- 1}

).

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 10

A whistle producing sound waves of frequency

5000 Hz

and is approaching a stationary person with speed

v .

If person can hear frequencies upto maximum

5500 Hz

, the maximum value of

v

upto which he can hear the whistle is [Speed of sound

v_{sound} = 350 {ms}^{- 1}

]