Question

Mangal's transformer, whose efficiency is 90% draws 5A when 200V is applied to its primary coil. Find the current in the secondary coil, if output is drawn at 300V. The number of turns in the primary coil being 500, find the number of turns in the secondary coil.

Answer 1

We can step the voltage down from a high voltage to a smaller one or we can step it up. The principles are the same. A transformer has two coils - a primary coil and a secondary coil. An alternating current flows in the primary coil and this induces a voltage in the secondary coil.