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an electric device is plugged into a 110v wall socket. if the device consumes 500 w of power, what is the resistance of the device
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Answer: R=24.2Ω
Explanation: Power is rate of work being done in an electric circuit. It relates to voltage, current and resistance through the following formulas:
P=V.i
P=R.i²
The resistance of the system is:
R = 24.2Ω
For the device, resistance is 24.2Ω.