Electrical energy is governed by several basic laws. The first, Ohm's law, is similar to the Lohm law and defines the resistance of a device to the flow of electrons.
|V = I x R||V = electric potential (volts)
I = current (amperes)
R = resistance (ohms)
When current passes through a resistance, power is dissipated in the form of heat, as in an oven. Power is calculated by the following:
|P = V x I||P = power (watts)|
These equations allow any one of the four electrical parameters to be expressed in terms of any other two. A reference table of derived expressions is given below.
Swipe to the right for more table information
|DC ELECTRICAL EQUATIONS|