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Power and Voltage

What happens to the power used by an electric appliance if the voltage across this appliance is decreased to half of the original value?

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Solution.

Denote the current voltage and the original voltage across this appliance by V2 and V1, respectively. Assume that the resistor of this appliance is R. Then the ...

Solution Summary

This solution provides in 131 words a calculation for current and original voltage to find power.

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