JEE PHYSICS MCQ: WAVES

1 Medium

1 of 1

Understanding +4 | -1

Statement-I: When a sound wave is propagating through the medium, the pressure fluctuations are

/ 2

out of phase with the displacements.
Statement-II: When a sound wave is propagating through the medium maximum pressure deviation occurs at the positions of zero displacement and no pressure change occur at the positions of maximum displacements.

View answer and explanation

Correct option: C

Both statement-I

\&

II are correct

Option C (Both statement-I & II are correct) is correct because pressure and displacement in a sound wave are out of phase by

\pi/2

, with maximum pressure at zero displacement and vice versa.

More Questions from WAVES

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The source of sound generating a frequency of

3\,\,kHz

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

and speed

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

(– \mathrm{ve}) \,x

-direction.
Reason: The given wave function is of the form

y = f(kx +\omega t),

which represent a wave travelling in negative

X

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0.01\,\,s

. the fundamental frequency is A rope

5 \mathrm{~m}

long has a total mass of

245 \mathrm{~g}

. It is stretched with a constant tension of

1 \mathrm{~kg}

wt. If it is fixed at one end and shaken by hand at the other end, what frequency of shaking will make it break up into three vibrating segments? Take

g=980 \mathrm{~cm} \mathrm{~s}^{-2}

. If

T

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V

then