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

Question

A power transmission line feeds input power at 2300 V to a step-down transformer with its primary windings having 4000 turns giving the output power at 230 V . If the current in the primary coil of the transformer is 5 A and its efficiency is 90 % , the output current would be:, 45 A, 50 A, 20 A, 25 A

MARKS App · Accepted Answer

Efficiency, η = 0.9 = P s P p V s I s = 0.9 × V p I p I s = 0.9 × 2300 × 5 230 = 45 A

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