A power transmission line feeds input power at 2.3 kV to a step down transformer with its primary winding having 3000 turns . The output power is delivered at 230 V by the transformer. The current in

Question

A power transmission line feeds input power at 2.3 kV to a step down transformer with its primary winding having 3000 turns . The output power is delivered at 230 V by the transformer. The current in the primary of the transformer is 5 A and its efficiency is 90% . The winding of transformer is made of copper. The output current of transformer is ____ A .

TestHub · Accepted Answer

Given: Input power, P i ​ = 2300 × 5 watt Output power, P 0 ​ = 2300 × 5 × 0.9 Now, we can write η = P in ​ P o u t ​ ​ = V P ​ I P ​ V S ​ I S ​ ​ ⇒ 0.9 = 2300 × 5 230 I S ​ ​ ⇒ I S ​ = 45 A .

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