Question

5. Given a Transformer rated 100KVA, 100V /10000V, with core losses 1200W and copper losses
of 600W at load of 6A
Determine the efficiency
a) At O.B PF
i) FULL load H) HALF LOAD
b) At Unity PF
1) FULL load T) HALF LOAD
Formula
VIIs cose
77 -
x100%
PO + Pour +VSI, cos e
Pcu also changes with Load
PF-Cos e​

Answer 1

Answer:

A diode having forward resistance of 50 Ω supplies power to a load resistance

1200 Ω from a 20 V (rms) source. Calculate the dc load current and the dc

output power