The physical relationship between current, voltage, and resistance is described by Ohm's Law:
V = I × R
Where:
| Quantity | Symbol | Unit | Description |
|---|---|---|---|
| Current | I | A (Ampere) | Flow of electric charge |
| Voltage | V | V (Volt) | Electrical potential difference |
| Resistance | R | Ω (Ohm) | Opposition to current flow |
| Power | P | W (Watt) | Rate of energy consumption |
The amount of electricity consumed is measured in kilowatt-hours (kWh).
Energy (kWh) = Power (kW) × Time (h)