A) 666 Hz
B) 753 Hz
C) 500 Hz
D) 333 Hz
Correct Answer: A
Solution :
| \[f=\frac{2}{2\ell }{{v}_{s}}\]\[=\frac{3.30}{0.5}\]= 660 Hz |
| \[\therefore \] \[f'=f\,\left( \frac{{{v}_{s}}+v}{{{v}_{s}}} \right)\]\[=(660)\left( \frac{330+\frac{50}{18}}{330} \right)\]\[=660\left( 1+\frac{50}{18\times 330} \right)\]\[=666\text{ }Hz,\] |
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