Question: A step-up transformer is designed to have an output voltage of 2 200 V (rms) when the primary is connected across a 110-V (rms) source.

A step-up transformer is designed to have an output voltage of 2 200 V (rms) when the primary is connected across a 110-V (rms) source.
(a) If the primary winding has 80 turns, how many turns are required on the secondary?
(b) If a load resistor across the secondary draws a current of 1.50 A, what is the current in the primary, assuming ideal conditions?
(c) What If? If the transformer actually has an efficiency of 95.0%, what is the current in the primary when the secondary current is 1.20 A?

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