Series and parallel circuits
Voltage in a parallel circuit is equal across components Current in a series circuit is equal across components
Action and use of circuit components
The p.d. across an electrical conductor increases as its resistance increases for a constant current.
Potential Divider – Part of a circuit consisting of two resistors connected in series to obtain a smaller voltage than supplied.
- The input voltage is applied to the top & bottom of the series resistors.
- The output voltage is measured from the centre to the bottom of R2.
- The resistor with more resistance will have greater p.d.