JEE PHYSICS MCQ: WAVES

1 Medium

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Application +4 | -1

A microphone of cross-sectional area '

0.40 ' \mathrm{cm}^2

is placed in front of the small speaker emitting

\pi \mathrm{W}

of sound output. If the distance between microphone and the speaker is

2.0 \mathrm{~m}

, how much energy falls on the microphone in

5.0 \mathrm{~s}

View answer and explanation

Correct option: A

12.5 \mu \mathrm{J}

Option A (

12.5 \mu \mathrm{J}

) is correct because it is calculated by finding the intensity of sound at the microphone and then multiplying by the area and time.

More Questions from WAVES

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3\,\,kHz

0.5

f\mathrm{ }Hz

V\mathrm{ }m/sec

0.2\,\,V

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

(– \mathrm{ve}) \,x

y = f(kx +\omega t),

X

0.01\,\,s

5 \mathrm{~m}

245 \mathrm{~g}

1 \mathrm{~kg}

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

T

V