This base formula can be used in a different manner to calculate

   other factors.

             Rearrange the formula and you have

             Power = Current multiplied by Voltage

              Current = Power divided by Voltage

             Voltage = Power divided by Current

n       Power = Current × Voltage and you get     P=I×E

n      Current = Power / Voltage     I=P÷E

n      Voltage = Power / Current     E=P÷I