European trip. In France, the wall sockets provide an AC voltage with V rms = 230 V.

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European trip. In France, the wall sockets provide an AC voltage with Vrms = 230 V. You want to use an appliance designed to operate in the United States (Vrms = 120 V) and decide to build a transformer to convert the power line voltage in France to the value required by your appliance.
(a) Should you use a “stepdown” transformer (to make Vrms smaller) or a “step-up” transformer (which makes Vrms larger)?
(b) If the input coil of your transformer has 2000 turns, how many turns should the output coil have?

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