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A transformer with efficiency 80% works ...

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

A

40 A , 16 A

B

16 A , 40 A

C

20 A , 40 A

D

40 A , 20 A

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The correct Answer is:
A
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