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 delivered at 230 V by the transformer. If the current

Question

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 delivered at 230 V by the transformer. If the current in the primary of the transformer is 5 A and its efficiency is 90 % , the output current would be:

TestHub · Accepted Answer

Efficiency n = 90 % ⇒ 0.9 × p o w e r i n = P o w e r o u t 0.9 × 2300 × 5 = 230 × I o u t I o u t = 45 A

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