Physics · 2013
NEET 2013 · 5 May · Code W · Q22
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown…
A source of unknown frequency gives $\displaystyle 4$ beats/s, when sounded with a source of known frequency $\displaystyle 250$ Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency $\displaystyle 513$ Hz. The unknown frequency is :
Official answer
(1)
$\displaystyle 254$ Hz
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NEET (UG) 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.