1
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1
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A tunning fork of frequency 340 Hz resonates in the fundamental mode with an air column of length 125 cm in a cylindrical tube closed at one end. When water is slowly poured in it, the minimum height of water required for observing resonance once again is ___________ cm.

(Velocity of sound in air is 340 ms$$-$$1)

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2
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1
Change Language

A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork gives 4 beats with respect to the preceding fork and the frequency of the last fork is twice the frequency of the first, then the frequency of last fork is _________ Hz.

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3
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1
Change Language

The first overtone frequency of an open organ pipe is equal to the fundamental frequency of a closed organ pipe. If the length of the closed organ pipe is 20 cm. The length of the open organ pipe is _____________ cm.

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4
JEE Main 2022 (Online) 24th June Evening Shift
Numerical
+4
-1
Change Language

Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by $$y = (10\cos \pi x\sin {{2\pi t} \over T})$$ cm

The amplitude of the particle at $$x = {4 \over 3}$$ cm will be ___________ cm.

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