Student Login

Home›Chapters›Wave Motion PYQs›Beats›Question 59

JEE Main 2018 (15 Apr, Shift 2) · Beats

Beats question from JEE Main 2018 (15 Apr, Shift 2)

Q59JEE Main 2018 · 15 APR · SHIFT 2Medium

Beats

5 beats / second are heard when a tuning fork is sounded with a sonometer wire under tension, when the length of the sonometer wire is either 0.95 m or 1 m. The frequency of the fork will be:

Show answer and solution

Answer: (a)

$f \propto \dfrac{1}{L}$ : 0.95 m wire gives $n + 5$ , 1 m wire gives $n - 5$ .
$(n + 5) \times 0.95 = (n - 5) \times 1$
$0.05n = 9.75 \Rightarrow n = 195\text{ Hz}$
So the answer is (a) 195 Hz.

Report a mistake

More questions on Beats

A tuning fork vibrates with frequency 256 Hz and gives one beat per second with the third…JEE Main 2018 (15 Apr, Shift 1)
Three sound waves of equal amplitudes have frequencies (n - 1), n, (n + 1). They…NEET 2016 (Phase 2)
When two sound waves travel in the same direction in a medium, the displacements of a…JEE Main 2013 (9 Apr, Shift 1)
A source of unknown frequency gives 4 beats/s when sounded with a source of known…NEET 2013
Two sources of sound placed close to each other, are emitting progressive waves given by…NEET 2012 (AIPMT, Prelims)
Two identical piano wires, kept under the same tension T have a fundamental frequency of…NEET 2011 (AIPMT, Mains)
A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a…NEET 2010 (AIPMT, Prelims)
Three sound waves of equal amplitudes have frequencies (v-1), v, (v+1). They superpose to…JEE Main 2009 (AIEEE)