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Alternating Current

JEE Main level, single correct, medium

183 of 190

Question 183 of 190

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

Show answer and solution

Answer: (D) $45A$

Efficiency

n=90%

\Rightarrow 0.9\times powerin=Powerout

0.9\times 2300\times 5=230\times {I}_{out}

{I}_{out}=45A

JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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JEE Main Physics practice question on Alternating Current (Transformers), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.