Q9-e) A single phase stepped-down transformer rating 500 kVA have a primary and secondary winding resistances 0.5 Ω and 0.02Ω, respectively. The primary and secondary voltage are 11 kV and 400 V,...

Q9-e) A single phase stepped-down transformer rating 500 kVA have a primary and secondary winding resistances 0.5 Ω and 0.02Ω, respectively. The primary and secondary voltage are 11 kV and 400 V, respectively.

Consider core loss 5.0 kW.

i. Explain the difference between core loss and copper loss.
ii. If the power factor is 0.8, estimate the efficiency at full load and half
load