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AIPMT 2013 Physics and Chemistry Paper

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Question : 37

Total: 90

A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250‌Hz, The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513‌Hz, The unknown frequency is

260 Hz
254 Hz
246 Hz
240 Hz

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