MHT CET 2025 19th April Evening Shift | Waves Question 55 | Physics

A progressive wave of frequency 400 Hz is travelling with velocity $336 \mathrm{~m} / \mathrm{s}$. How far apart are the two points on a wave which are $60^{\circ}$ out of phase?

0.12 m

0.14 m

0.21 m

0.28 m

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

When two tuning forks are sounded together, 6 beats per second are heard. One of the fork is in unison with 0.70 m length of sonometer wire and another fork is in unison with 0.69 m length of the same sonometer wire. The frequencies of the two tuning forks are

$320 \mathrm{~Hz}, 326 \mathrm{~Hz}$

$414 \mathrm{~Hz}, 420 \mathrm{~Hz}$

$420 \mathrm{~Hz}, 426 \mathrm{~Hz}$

$480 \mathrm{~Hz}, 486 \mathrm{~Hz}$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

When source of sound moves towards a stationary observer, the apparent frequency heard by him

increases and wavelength also increases.

increases while wavelength decreases.

remains the same while wavelength decreases.

decreases and wavelength remains the same.

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

The frequency of fourth overtone of a closed pipe is in unison with the fifth overtone of an open pipe. The ratio of length of closed pipe to that of open pipe is

$2: 3$

$3: 4$

$4: 5$

$5: 6$

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