Question

A step down transformer changes the voltage from 2200 V to 220 V. Its primary coil has 5000 turns. If the efficiency of the transformer is 80% and output power is 8 kW, then find out the:
(i) N_S
(ii) I_S
(iii) I_P
(iv) input power.

Answer 1

Potential in primary coil (V_P)= 2200 V
Potential in secondary coil (V_S) = 220 V
Turns in primary coil (N_P)= 5000
Efficiency (η) = 80%
Output power Pout = 8 kW
By the formula: