Question 198: AC fundamentals

Question

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 _________ $$A$$.

Accepted Answer

$$\begin{aligned}
& P_i=2300 	imes 5 	ext { watt } \
& P_0=2300 	imes 5 	imes 0.9=230 	imes I_2 \
& I_2=45 A
\end{aligned}$$

AC fundamentals

Integer / Numeric Answer Type