JEE PHYSICS MCQ: WAVES

1 Medium

1 of 1

Application +4 | -1

In Quincke's experiment, the sound intensity has a minimum value

I

at a particular position. As the sliding tube is pulled out by a distance of

16.5 \mathrm{~mm}

, the intensity increases to a maximum of

9 I

. Take the speed of sound in air to be

330 \mathrm{~ms}^{-1}

. (a) Find the frequency of the sound source. (b) Find the ratio of the amplitudes of the two waves arriving at the detector assuming that it does not change much between the positions of minimum intensity and maximum intensity.

View answer and explanation

Correct option: A

5.0 kHz; 2

Option A (5.0 kHz; 2) is correct because the frequency is calculated from the wavelength derived from the path difference, and the amplitude ratio is derived from the intensity ratio.

More Questions from WAVES

Practice All Chapter MCQs →

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

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

-direction. In the fundamental mode, time taken by the wave to reach the closed end of the air filled pipe is

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}

T

is the reverberation time of an auditorium of volume

V