A) fundamental frequency = 10 Hz
B) fundamental frequency =15 Hz
C) fundamental frequency = 20 Hz
D) fundamental frequency = 25 Hz
Correct Answer: C
Solution :
From given equation, |
\[\omega =2\pi f=628\] |
\[\Rightarrow \,\,\,\,\,f\frac{628}{2\pi }=100Hz\] |
This may be third, fifth or seventh harmonic as there is an anti-node at mid-point. |
So, fundamental frequency may be |
\[\frac{100}{3,}\frac{100}{5},\frac{100}{7}......,\]etc. |
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