A power transmission line feeds input power at $2.3 \mathrm{~kV}$ to a step down transformer with its primary winding having 3000 turns. The output power is delivered at $230 \mathrm{~V}$ by the transformer. The current in the primary of the transformer is $5 \mathrm{~A}$ and its efficiency is $90 \%$. The winding of transformer is made of copper. The output current of transformer is _________ $A$.
Answer (integer)
45
Solution
<p>$$\begin{aligned}
& P_i=2300 \times 5 \text { watt } \\
& P_0=2300 \times 5 \times 0.9=230 \times I_2 \\
& I_2=45 A
\end{aligned}$$</p>
About this question
Subject: Physics · Chapter: Alternating Current · Topic: AC Circuits: R, L, C
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