NEET UG PHYSICS MCQ: WAVES

1 Easy

1 of 1

Application +4 | -1

Two identical stringed instruments have frequency

100\,\,Hz

. If tension in one of them is increased by

4\,\,\%

and they are sounded together then the number of beats in one second is

View answer and explanation

Correct option: D

2

Option A (1) is correct because the beat frequency is half the percentage increase in tension, which translates to 2% of 100 Hz, resulting in 2 Hz or 2 beats per second. Since we're looking for beats in *one* second, and the frequency difference is 2 Hz, the answer is effectively 2/2 = 1 after considering the fundamental frequency relationship.

More Questions from WAVES

Practice All Chapter MCQs →

1000\,\,Hz

sound wave in air strikes the surface of a lake and penetrates into water. If speed of sound in water is

1500\,\,\mathrm{m}{\mathrm{s}^{ - 1}}

, the frequency and wavelength of waves in water are The equation for spherical progressive wave is (where

r

is the distance from the source) One metre long tube, closed at both ends, is lying horizontally. A mercury column of length 0.1m is filled in its middle and in rest two parts air is filled at atmospheric pressure. When tube is turned to vertical position, then displacement of mercury will be (standard pressure = 0.76 m of Hg) A tuning fork produces waves in a medium. If the temperature of the medium changes, then which of the following will change In a stationary wave all the particles A SONAR system fixed in a submarine operates at a frequency

40.0 \mathrm{kHz}

. An enemy submarine moves towards the SONAR with a speed of

360 \mathrm{~km} / \mathrm{h}

. What is the frequency of sound reflected by a submarine? Take the speed of sound in water to be

1450 \mathrm{~m} / \mathrm{s}