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1. |
Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512 Hz. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be? |
A. | 502 Hz |
B. | 507 Hz |
C. | 517 Hz |
D. | 522 Hz |
Answer» D. 522 Hz | |