An AC source (Vrms = 55.2 V, frequency f = 43.7 Hz) is connected to the primary coil of a transformer (length / = 22.4 cm, Np = 962 circular turns, each turn of radius r= 8.28 cm). Assume the primary circuit has negligible resistance. The secondary coil has 3,822 turns, and the efficiency of the transformer is 40.8%. Find the rms current, in A, that flows in the secondary coil.

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