Gamma Question Bank for Medical Physics>Chapter 15 - Waves>EXERCISE>Q 12

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A suspension bridge is to be built across valley where it is known that the wind can gust at $5 s$ intervals. It is estimated that the speed of transverse waves along the span of the bridge would be $400 m s^{- 1}$ . The danger of resonant motions in the bridge at its fundamental frequency would be greater if the span had a length of

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Important Questions on Waves

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>EXERCISE>Q 16

Two tuning fork

A

and

B

are sounded together gives

5

beats per second. If frequency of

B

is

260 Hz

and after loading

B

with wax the beat frequency increases the frequency of

A

is

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>EXERCISE>Q 19

Two sources

A

and

B

are sounding notes of frequency

660 Hz .

A listener moves from

A

to

B

with a constant velocity

u

. If the speed of sound is

330 m s^{- 1}

, what must be the value of

u

so that he hears

8 beats per second

?

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

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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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