How do you calculate the voltage of a circuit given the power and current values?

To determine the voltage of a circuit using the power and current values, the formula E = P/I is employed, where E represents voltage, P represents power, and I represents current. This formula derives from the relationship defined by Ohm's Law and the power formula in electrical circuits, where power (P) is equal to voltage (E) times current (I). By rearranging this formula, you isolate voltage, leading to the conclusion that E = P/I.

Using this relationship, you can effectively calculate the voltage when you have the power and current values as inputs. For example, if you know that a circuit has a power consumption of 100 watts and a current of 5 amperes, you can substitute these values into the formula to find that the voltage would be 20 volts, illustrating how this calculation works practically.

The other formulas presented do not align with the foundational electrical principles. Some may incorrectly suggest inversely relating power and current or misrepresent the relationship between these variables. The correct understanding of the power relationship is crucial for effectively analyzing and designing electrical circuits.