1.

A transformer with efficiency 80% works at 4 kW and 100 V. If the secondary voltage is 200 V, then the primary and secondary currents are respectively [Kerala PMT 2005]

A.            40 A, 16 A        
B.            16 A, 40 A
C.            20 A, 40 A        
D.            40 A, 20 A
Answer» B.            16 A, 40 A


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