JEE PHYSICS MCQ: WAVES

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Application +4 | -1

The number of beats produced per second by two vibrations:

{x_1} = {x_0}\sin \,\,646\,\,\pi t

and

{x_2} = {x_0}\sin \,\,652\,\,\pi t

is

View answer and explanation

Correct option: B

3

Option B (3) is correct because the beat frequency is the absolute difference between the frequencies of the two vibrations.

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The source of sound generating a frequency of

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reaches an observer with a speed of

0.5

times, the velocity of sound in air. The frequency heard by the observer is A source of sound emits waves with frequency

f\mathrm{ }Hz

V\mathrm{ }m/sec

. Two observers move away from this source in opposite directions each with a speed

0.2\,\,V

relative to the source. The ratio of frequencies heard by the two observers will be Assertion: The wave function of a pulse is given by

y = \frac{3}{{{{\left( {2x + 3t} \right)}^2} + 4}},

it propagates in

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y = f(kx +\omega t),

which represent a wave travelling in negative

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0.01\,\,s

. the fundamental frequency is A rope

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is the reverberation time of an auditorium of volume

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