AIPMT PRELIMS2010Physics-Waves
AIPMT PRELIMS 2010 Physics Sound Waves MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
A
508 Hz
B
510 Hz
C
514 Hz
D
516 Hz
Correct Answer
Option A
Detailed Explanation
The initial beat frequency of 4 Hz indicates the piano string frequency was either 508 Hz or 516 Hz. Increasing tension increases frequency, reducing beats to 2 Hz, confirming the initial frequency was 510 Hz.
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