MHT CET 2025 25th April Evening Shift | Waves Question 13 | Physics

The fundamental frequencies of vibrations of air column in pipe open at both ends and in pipe closed at one end are ' $\mathrm{n}_1$ ' and ' $\mathrm{n}_2$ ' respectively, then

$\mathrm{n}_1=\mathrm{n}_2$

$\mathrm{n}_1=2 \mathrm{n}_2$

$\quad 2 n_1=n_2$

$3 n_1=4 n_2$

MHT CET 2025 25th April Evening Shift

MCQ (Single Correct Answer)

-0

In an open end organ pipe of length ' $L$ ', if the velocity of sound is ' V ', then the fundamental frequency will be (Neglect end correction)

$\frac{\mathrm{V}}{2 \mathrm{~L}}$ and all harmonics are present.

$\frac{\mathrm{V}}{4 \mathrm{~L}}$ and all harmonics are present.

$\frac{\mathrm{V}}{2 \mathrm{~L}}$ and even harmonics are present.

$\frac{\mathrm{V}}{4 \mathrm{~L}}$ and even harmonics are present.

MHT CET 2025 25th April Evening Shift

MCQ (Single Correct Answer)

-0

At what speed should a source of sound move so that the observer finds the apparent frequency equal to half the original frequency?

$\frac{\mathrm{V}}{2}$

2 V

$\frac{\mathrm{V}}{4}$

MHT CET 2025 25th April Evening Shift

MCQ (Single Correct Answer)

-0

A tuning fork gives 5 beats per second with 40 cm length of sonometer wire. If the length of the wire is shortened by 1 cm , the number of beats is still the same. The frequency of the fork is

390 Hz

395 Hz

400 Hz

405 Hz

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