Answer: A. 0.2 A
A transformer has a turn ratio, NS/NP=4. If a 200 V AC voltage is applied across its primary coil, and it carries 1 A current, find current in the circuit connected to the secondary coil if the transformer is 80% efficient.
Given that, a transformer has a turns ratio NS/NP=4
Primary voltage (VP)=200 V
Given that, the efficiency of the transformer =VsIs/ VPIP=80%
Hence option A is the correct answer.
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