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

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:

Quantrex Academy · Accepted Answer

Correct answer: D. 45 &#160; A

Efficiency n = 90 % &#8658; 0.9 &#215; p o w e r &#160; i n = P o w e r &#160; o u t 0.9 &#215; 2300 &#215; 5 = 230 &#215; I o u t I o u t = 45 &#160; A

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:

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