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in Physics by (122k points)
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
A. 40A, 16 A
B. 16 A, 40 A
C. 20 A, 40 A
D. 40 A, 20 A

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1 Answer

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by (122k points)
Correct Answer - A

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