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A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The output power is devlivered at 230 V by the transformer. If the current in the primary of the transformer is 5A and its efficiency is 90%, the output current would be :

1. 45 A
2. 35 A
3. 25 A
4. 50 A

Correct answer: 45 A

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