A) 50 V
B) 70 V
C) 100 V
D) 40 V
Correct Answer: A
Solution :
\[\frac{{{N}_{s}}}{{{N}_{p}}}=\frac{{{V}_{s}}}{{{V}_{p}}}\Rightarrow \frac{250}{100}=\frac{{{V}_{s}}}{28/\sqrt{2}}\Rightarrow {{V}_{s}}=50\ V\]
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