A) 2.5 A
B) 5 A
C) 0.25 A
D) 0.5 A
Correct Answer: C
Solution :
\[{{V}_{p}}=220V,{{V}_{s}}=2200V,{{I}_{p}}=5A,{{I}_{s}}=?\] Power loss = 50% Efficiency of transformer \[(\eta )\]is defined as the ratio of output power and input power ie, \[\eta %=\frac{{{p}_{out}}}{{{p}_{in}}}\times 100=\frac{{{V}_{s}}{{I}_{s}}}{{{V}_{p}}{{I}_{p}}}\times 100\] \[50=\frac{2200\times {{I}_{s}}}{220\times 5}\times 100\] \[{{I}_{s}}=0.25A\]
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