A) 284 Hz
B) 265 Hz
C) 258 Hz
D) 252 Hz
Correct Answer: C
Solution :
Given: In first case number of beats per second =8 beats when frequency = 250 Hz In second case number of beats per second =12 beats when the frequency =270 Hz In the first case the unknown frequency X is given by \[250\pm 8=258\]or \[242\,Hz\] Similarly, in second case, the unknown frequency X is given by \[270\pm 12=282\text{ }or\text{ }258\text{ }Hz\] Therefore, the common value of frequency of the source will be 258 Hz.You need to login to perform this action.
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