Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 46

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Two vibrating tuning forks are producing waves given by
$y_{1} = 27 \sin 600 π t$ and $y_{2} = 27 \sin 604 π t$
These forks are sounded together near the ear of a person. The number of beats heard by him in three seconds is

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Important Questions on Waves

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 47

Two waves of frequencies

6 Hz

and

10 Hz

are superposed. The beat frequency produced is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 48

Two waves of wavelengths

99 cm

and

100 cm

produce

4

beats per second. Velocity of sound in the medium is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 49

A tuning fork produces

2

beats per second when sounded with another tuning fork of frequency

250 Hz .

It gives the same number of beats per second when loaded with wax. The initial frequency of

1^{st}

tuning fork is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 50

Two waves of frequencies

50 Hz

and

45 Hz

are produced simultaneously, then the time interval between successive maxima of the resulting wave is [Maxima refers to the maximum intensity]

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 51

A set of

10

tuning forks is arranged in series of increasing frequency. If each fork gives

3

beats with the preceding one and the last fork has twice the frequency of the first, then frequency of the first tuning fork is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 52

The displacement at a point due to two waves are given by

y_{1} = 2 \sin (50 π t)

and

y_{2} = 3 \sin (58 π t) .

Number of beats produced per second is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 53

A tuning fork of unknown frequency produces

4

beats per second when sounded with another tuning fork of frequency

254 Hz

. It gives the same number of beats per second when unknown tuning fork loaded with wax. The unknown frequency before loading with wax is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 54

A listener and a source of sound are moving with the same speed in the same direction. The ratio of the frequency of the source and the frequency which is heard by the listener is