AIIMS 2018 Physics Beat Frequency MCQ Question
A tuning fork arrangement (pair) produces 4 beats/sec with one fork of frequency 288 cps. A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency of the unknown fork is
286 cps
292 cps
294 cps
288 cps
Correct Answer
Detailed Explanation
The unknown fork must have a frequency of 292 cps because the problem states that the difference in frequencies between the two forks is 4 cps, and the second condition specifies that this difference can only be 2 cps when the unknown fork's frequency is higher. Since 292 cps is the only frequency that satisfies both conditions, it is the only valid option. The other option, 284 cps, would not meet the requirement of having a frequency difference of 2 cps when compared to the known fork frequency.
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