MHT CET Physics question
A power transformer is used to step up an alternating e.m.f. of 220 V to 11 kV to transmit 4.4 kw of power. If the primary coil has 1000 turns, what is the current rating of the secondary? assume 100% efficiency for the transformer
Answer: (B)
Solution
A; 4 A, 0.04 A and 0.2 A do not match (20 A would be the primary current). Hence the correct option is (b).