JEE PHYSICS MCQ: WAVES

1 Medium

1 of 1

Application +4 | -1

A Kundt's tube apparatus has a copper rod of length

1.0 \mathrm{~m}

clamped at

25 \mathrm{~cm}

from one of the ends. The tube contains air in which the speed of sound is

340 \mathrm{~m} / \mathrm{s}

. The powder collects in heaps separated by a distance of

5.0 \mathrm{~cm}

. Find the speed of sound waves in copper.

View answer and explanation

Correct option: A

3400 m/s

Option A (3400 m/s) is correct because the speed of sound waves in copper is calculated using the relationship between the speed of sound in the rod and the air, and the lengths of the rod and the distance between heaps.

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

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

-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}

. If

T

is the reverberation time of an auditorium of volume

V

then