Alternating Current Question 11
Question 11 - 2024 (30 Jan Shift 2)
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.
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Answer: (45)
Solution:
$P _i=2300 \times 5$ watt
$P _0=2300 \times 5 \times 0.9=230 \times I _2$
$I _2=45 A$
