A) 4.65 mA
B) 0.045 A
C) 0.45 A
D) 4.65 A
Correct Answer: C
Solution :
Efficiency of transformer, \[\eta =\frac{Output\text{ }power}{Input\text{ }power}\] \[\Rightarrow \] \[\frac{88}{100}=\frac{880}{{{p}_{i}}}\] \[\Rightarrow \] \[{{p}_{i}}=1000\,W\] Input current, \[{{I}_{p}}=\frac{{{P}_{i}}}{{{V}_{i}}}\] \[=\frac{1000}{2200}\] \[=0.45\text{ }A\]
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