On sounding tuning fork A with another tuning fork B of frequency $$384$$ Hz, $$6$$ beats are produced per second. After loading the prongs of A with some wax and then sounding it again with B, $$4$$ beats are produced per second. What is the frequency of the tuning fork A

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Infinity Learn · Accepted Answer

nA $$=$$ ?, nB $$=$$ $$384$$ Hz x $$=$$ $$6$$ bps, which is decreasing (from$$ $$6$$ to $$4) i.e. x↓ Tuning fork A is loaded so  nA↓Hence nA↓ – nB $$=$$ x↓      →      Correct          nB – nA↓ $$=$$ x↓       →       Wrong⇒ nA $$=$$ nB $$+$$ x $$=$$ $$384$$ $$+$$ $$6$$ $$=$$ $$390$$ Hz.

On sounding tuning fork A with another tuning fork B of frequency 384 Hz, 6 beats are produced per second. After loading the prongs of A with some wax and then sounding it again with B, 4 beats are produced per second. What is the frequency of the tuning fork A

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