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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 | |||
|---|---|---|---|
| VOLTAGE | CURRENT | RESISTANCE | POWER |
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