Question: The power brick for the authors laptop computer has a power rating of 45 W. It uses a step-down transformer to convert the AC voltage

The power brick for the author’s laptop computer has a power rating of 45 W. It uses a step-down transformer to convert the AC voltage from a wall socket (V_rms = 120 V) to a value near 12 V.
(a) What is the rms current in the input coil of the transformer?
(b) What is the rms current in the output coil of the transformer?

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