I Ohm's Law Circle Use the circle by covering the unknown value with a finger.
Power is the quantity of work done in a determined amount of time.
One Watt is equal to the work done by one volt moving a current of one ampere. Power Formulas Power is directly proportional to both current and voltage. I x E The Circle shows three formulas for each quantity using the power formula and Ohm's Law. Using the circle you can find a correct formula for any problem if two quantities are known. Copyright 1995 HvacWebTech.