MHT CET 2026 Physics question
A musical 'instrument P produces sound waves of frequency 'n' and amplitude 'A'. Another musical instrument Q produces sound waves of frequency n/4. The waves produced by P and Q have equal energies. The amplitude of waves produced by Q will be
Answer: (C)
Solution
The energy per unit volume (energy density) of a wave of frequency and amplitude is , so for the same medium . Equal energies give
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