Electricity
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Electric power and energy
Electric power received by an electrical device
In direct current, the electrical power (P) received by a device is equal to the product of its voltage (U) and current received (I).
This relationship is then written as follows:
P = U x I
It may take three different forms:
P = U x I
U = P / I
I= P / U
Comment: these relations are also valid in alternating current for electric devices consisting only of resistors.
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