A transformer with efficiency \( 80 \% \) works atqkW and P \( 100 ...

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A transformer with efficiency \( 80 \% \) works atqkW and
P \( 100 \mathrm{~V} \). If the secondary voltage is \( 200 \mathrm{~V} \). Then, the

W primary and secondary currents are respectively:
(1) \( 40 \mathrm{~A}, 16 \mathrm{~A} \)
(2) \( 16 \mathrm{~A}, 40 \mathrm{~A} \)
(3) \( 20 \mathrm{~A}, 40 \mathrm{~A} \)
(4) \( 40 \mathrm{~A}, 10 \mathrm{~A} \)
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