NEET UG PHYSICS MCQ: WAVES

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Analyzing +4 | -1

A tuning fork of frequency

480\,\,Hz

produces 

\mathrm{10}{\mkern 1mu} {\mkern 1mu} \,\,\mathrm{beats}\,\,\mathrm{per}\,\,\mathrm{sec}

when sounded with a vibrating sonometer string. What must have been the frequency of string if slight increase in tension produces few beats

{\mathrm{s}^{ - 1}}

than before?

View answer and explanation

Correct option: B

\begin{array}{llllllllllllllllllll} {470\,\,Hz} \end{array}\,

Option B (470 Hz) is correct because the frequency of the string must be lower than the tuning fork's frequency, and increasing tension reduces the beat frequency.

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