Which formula represents Ohm's Law for calculating power?

The formula that represents Ohm's Law for calculating power is expressed as P = I × E. This relationship illustrates how power (P) is the product of current (I) and voltage (E). In electrical circuits, power is measured in watts, current in amperes, and voltage in volts.

Understanding this formula is crucial for linemen and electrical engineers because it helps in assessing the amount of power being consumed or generated in a system. By knowing the current flowing through a circuit and the voltage across it, one can easily determine the total power being used.

It's important to recognize how this formula fits into the broader context of Ohm's Law, which also connects resistance (R), voltage (E), and current (I) through other formulations, but specifically for power calculation, the focus remains on the direct multiplication of current and voltage. This power calculation is foundational for designing and troubleshooting electrical systems effectively.