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A modem uses 8.4 W to operate, and its transformer draws 15 W of power. What is its percent efficiency?
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A modem uses 8.4 W to operate, and its transformer draws 15 W of power. What is its percent efficiency?

User Caulitomaz
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Answer:

Substitute these values in the power equation: Power = 10 amps × 120 volts = 1200 watts, or 1.2 kilowatts

User Ximyu
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