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