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

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The wavelength of sound waves in hydrogen gas corresponding to the lower limit of audibility is (speed of sound in hydrogen gas is about $1350 m s^{- 1}$ )

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Important Questions on Waves

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

An iron block is dropped into a deep well. Sound of splash is heard after

4.23 s .

If the depth of the well is

78.4 m,

then find the speed of sound in air

(g = 9.8 m s^{- 2})

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>EXERCISE>Q 11

A wave represented by the equation

y = a \cos (k x - ω t)

is superposed with another wave to form a stationary wave such that the point

x = 0

is a node. The equation for other wave is:

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

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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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