Question
Physics Question on Wavelength and Frequency
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is
A
254 Hz
B
246 Hz
C
240 Hz
D
260 Hz
Answer
246 Hz
Explanation
Solution
The correct option is (B): 246 Hz