A) \[60Hz\]and\[240V\]
B) \[19Hz\]and\[120V\]
C) \[19Hz\]and\[170V\]
D) \[754Hz\]and\[170V\]
Correct Answer: C
Solution :
Voltage equation is \[V=240\sin 120t\] Comparing with\[V={{V}_{0}}\sin \omega t\], we get \[\omega =120\] and \[{{V}_{0}}=240\,\,V\] \[\therefore \] \[2\pi n=120\] or \[n=\frac{120\times 7}{2\times 22}=19Hz\] and \[{{V}_{rms}}=\frac{{{V}_{0}}}{\sqrt{2}}=\frac{\sqrt{2}{{V}_{0}}}{2}\] \[=\frac{\sqrt{2}\times 240}{2}=120\sqrt{2}\] \[=170\,\,V\]
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