Voltage
The electrical potential difference between two points, measured in volts (V). It's the "pressure" that pushes electric charge through a circuit.
concept
Voltage
Voltage (symbol: V) is the electrical potential difference between two points in a circuit.
Definition
Voltage is measured in volts (V) and represents the “pressure” that pushes electric charge through a conductor. It’s analogous to water pressure in a pipe.
Key Points
- Voltage is a potential - it exists even when no current flows
- Higher voltage = more “push” for electrons
- Common values: 1.5V (battery), 3.3V (logic), 5V (USB), 12V (automotive)
Related Concepts
- Current: The flow of charge (measured in amperes)
- Resistance: Opposition to current flow (measured in ohms)
- Power: Rate of energy transfer (P = V × I)