Electromotive Force: Ohms
The "Resistance" of a circuit opposes current flow. The unit of measure for resistance is the "Ohm" .
One ohm is defined as the amount of resistance that will allow one amp to flow when being pushed by one volt of pressure.
Resistance slows the flow of current (reduces the number of electrons flowing).
Resistance changes electrical energy into another form of energy (e.g. heat, light or motion).
ELECTRICAL UNITS OF MEASURE
| Unit of Measure | Symbol | Basic Unit | Units |
| Volt | V, U, or E | Volt | V = Volt = 1 volt mV = millivolt = .001 volt KV = Kilovolt = 1,000 volts |
| Ampere | Amp, A, or I | Amp | A = amp = 1 amp mA = milliamp - .001 A KA = Kiloamp = 1,000A |
| Ohm | Ω | Ohm | 1Ω = 1 ohm mΩ = milliohm = .001 ohm K = kilo-ohm = 1,000 ohms M = Megaohm = 1,000,000 ohms |