MHT CET 2025 23rd April Evening Shift | Waves Question 20 | Physics

The fundamental frequency of sonometer wire is ' $n$ '. If the tension and length are increased 3 times and diameter is increased twice, the new frequency will be

$\sqrt{\frac{3}{2}} \mathrm{n}$

$\frac{\sqrt{3}}{2} n$

$\frac{n}{2 \sqrt{3}}$

$2 \sqrt{3} n$

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

A particle performs S.H.M. of amplitude 'A' and wavelength ' $\lambda$ ', Then the velocity of the wave (V) and the maximum particle velocity (v) are related as

$v=\frac{\lambda V}{4 \pi A}$

$\quad V=\frac{\lambda v}{4 \pi A}$

$\quad v=\frac{2 \pi A}{\lambda} v$

$V=\frac{2 \pi A}{\lambda} v$

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

Two identical straight wires are stretched so as to produce 6 beats per second when vibrating simultaneously with tensions ' $\mathrm{T}_1$ ' and ' $\mathrm{T}_2$ ' respectively. On changing the tension slightly in one of them, the beat frequency remains unchanged. This will happen when (Given $\rightarrow \mathrm{T}_1>\mathrm{T}_2$ )

$\mathrm{T}_1$ is increased or $\mathrm{T}_2$ is decreased

$\mathrm{T}_1$ is increased by 144

$\mathrm{T}_2$ is decreased by 144

$T_1$ is decreased or $T_2$ is increased

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

An observer moves towards a stationary source of sound with a velocity of one fifth of the velocity of sound. The percentage increase in the apparent frequency is

$5 \%$

$10 \%$

$20 \%$

$25 \%$

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