Portal:Energy/Selected page/8
From Appropedia
Electricity basics. Some basic definitions, equations and analogies of electricity.
| Term | Symbol | Unit | Description | Water Analogy |
| Voltage | V | volt (V) | Pressure (Potential) difference due to charge difference | Head: Pressure (Potential) difference due to height difference |
| Current | I | amp (A) | Flow of charge in charge/time or coulombs/sec | Flow: Flow of water in volume per time such as liters/sec |
| Resistance | R | ohm (Ω) | Opposition to the flow of charge | Friction: Opposition to the flow of water |
| Power | P | watt (W) | Energy/Time = Power=Current*Voltage | Power: Power=Current*Pressure |
| Energy | E | watt-hour (Wh) | The ability to do work | Energy: The ability to do work |
