Question

Name the coil of which the wire is thicker in a step up transformer. Give reason to your answer.

Answer 1

In a step-up transformer, thicker wire is used in the primary coil as compared to that in the secondary coil.

The use of thicker wire reduces its resistance and therefore reduces the loss of energy as heat in the coil. In step up N_S > N_P therefore E_S > E_P, but Is < I_P i.e., more current flows in the primary coil.