Student Login

Home›Chapters›Wave Motion PYQs›Beats›Question 51

MHT CET 2021 (24 Sep, Shift 1) · Beats

Beats question from MHT CET 2021 (24 Sep, Shift 1)

Q51MHT CET 2021 · 24 SEP · SHIFT 1Medium

Beats

A sonometer wire of length 25 cm vibrates in unison with a tuning fork. When its length is decreased by 1 cm, 6 beats are heard per second. What is the frequency of the tuning fork?

Show answer and solution

Answer: (d)

$f \propto \dfrac{1}{L}$ : the 24 cm wire gives $n + 6$ .
$n \times 25 = (n + 6) \times 24$
$n = 6 \times 24 = 144\text{ Hz}$
So the answer is (d) 144 Hz.

Report a mistake

More questions on Beats

A closed organ pipe and an open organ pipe of same length produce 2 beats per second when…MHT CET 2021 (24 Sep, Shift 2)
Two waves Y₁ = 0.25sin 316t and Y₂ = 0.25sin 310t are propagating along the same…MHT CET 2020 (16 Oct, Shift 1)
A tuning fork A produces 5 beats per second with a tuning fork of frequency 480 Hz. When…MHT CET 2020 (19 Oct, Shift 2)
In a guitar, two strings A and B made of same material are slightly out of tune and…NEET 2020 (Phase 1)
For formation of beats, two sound notes must haveMHT CET 2019 (3 May, Shift 1)
The correct figure that shows, schematically, the wave pattern produced by superposition…JEE Main 2019 (10 Apr, Shift 2)
Two sitar strings, A and B, playing the note 'Dha' are slightly out of tune and produce…JEE Main 2018 (16 Apr, Shift 1)
5 beats / second are heard when a tuning fork is sounded with a sonometer wire under…JEE Main 2018 (15 Apr, Shift 2)