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Electric Circuits - Checking a Circuit with a Power Balance

One method of checking calculations in volving interconnected circuit elements is to see that the total power delivered equals the total power absorbed...

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This key to this problem is how the voltage and current signs are defined.
When current through the element flows from the negative to the positive terminal it is a power source. When the current through the ...

Solution Summary

A detailed solution is given to this problem of checking the accuracy of a circuit by doing a power balance. Sign conventions play a key role.