A) 60 Hz and 240 V
B) 19 Hz and 120 V
C) 19 Hz and 170 V
D) 754 Hz and 70 V
Correct Answer: C
Solution :
\[\nu =\frac{\omega }{2\pi }=\frac{120\times 7}{2\times 22}=19\ Hz\] \[{{V}_{r.m.s.}}=\frac{240}{\sqrt{2}}=120\sqrt{2}\approx 170\ V\]
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