A source X of unknown frequency produces 8 beats per
second with a source of 250 Hz and 12 beats per second
with a source of 270 Hz. The frequency of the source X is
(a) 242 Hz (b) 258 Hz
(c) 282 Hz (d) 262 Hz
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Answer:
b) 258 Hz
Explanation:
A source X of unknown frequency produces 8 beats per second with a source of 250 Hz . A source X of unknown frequency produces 12 beats per second with a source of 270 Hz . Thus, in both cases the common value of unknown frequency of source X is 258 Hz . Thus, the frequency of the source X is 258 Hz
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