Voltage
- Voltage is supplied by a source, such as:
- a cell
- batteries (multiple cells)
- an electrical generator
- The terminals a power source make one end of a circuit positive and the other negative
- This creates a voltage across the circuit
- Voltage is also sometimes called potential difference (or p.d.)
- The voltage of the source causes a current to flow in the circuit
Voltage in a series circuit
- In a series circuit, the voltage of the source is shared between the components
- The sum of voltages across the individual components is equal to the total voltage of the power supply
- If the components have equal resistance, then the voltage is shared equally
In a series circuit, the components share the voltage of the power supply