A power transmission line feeds input power at 2200 V to a step down transformer with its primary windings having 4000 turns. The number of turns in the secondary in order to get output power at 220 V will be:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 400
Using transformer equation,
$\frac{V_1}{V_2}=\frac{N_1}{N_2}$
$⇒N_2=\frac{N_1V_2}{V_1}=\frac{220×4000}{2200}=400\,turns$