A) \[198\,\,V\]
B) \[220\,\,V\]
C) \[240\,\,V\]
D) \[220\sqrt{2}\,\,V\]
Correct Answer: A
Solution :
[a] \[{{E}_{rms}}=220\,V\] \[\therefore \] \[{{E}_{rms}}=\frac{{{E}_{0}}}{\sqrt{2}}\]\[\Rightarrow \]\[{{E}_{0}}=\sqrt{2}{{E}_{rms}}\] Average e.m.f over half cycle \[=\frac{2}{\pi }{{E}_{0}}=0.637\times 1.41\times 220=198\,V\]
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