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A step-up transformer has 500 turns on its primary and 1000 turns on its secondary. When the primary is connected to 100 V and the secondary is connected to a floodlight that draws 4 A, what is the power output?

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Vo = 1000/500 * 100 = 200 Volts.

Po = Vo*Io = 200 * 4 = 800 Watts.

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