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Q6) A single-phase, 50 Hz transformer has 144 primary turns and 432 secondary turns, and a maximum flux of 7.5 mWb. The no-load input is 0.24 kVA at 0.26 power factor lagging. The transformer supplies a 1.2 kVA load at a power factor of 0.8 lagging.

Calculate EACH of the following:

(a) the magnetising current; (5)

(b) the primary current; (9)

(c) the primary power factor. (2)