a - b
A1. (a) A I KVA, 220/100 V, 50 Hz single-phase transformer has the following circuit parameters. Primary winding resistance: 2.5 N; Primary winding reactance: 3.5 12 Secondary winding resistance: 0.05 N; Secondary winding reactance: 0.1 1 (1) If the number of turns on secondary side is 125 turns, evaluate the number of turns on primary side, and the equivalent impedance referred to secondary side. (2 marks) (ii) (2 marks) (b) What kind of design is commonly used in manufacturing iron core of (4 marks) transformer to reduce an eddy current loss? Explain why.
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