What is current?
The rate of flow of charge.
What is potential difference?
It’s the energy the charge carrier (electron) has
What is resistance?
It’s the ratio of potential difference to current, how hard it is for current to flow.
What is a series circuit?
One with only one route (loop) for the current to flow through
What is a parallel circuit?
One with more than one route (loop) for the current to flow through. It has junctions where the current can split up or join back together.
What are the rules for current, p.d. And resistance in a series circuit?
Current is the same everywhere.
P.d. Of cells add up and are shared between components.
The total resistance is the sum of individual resistances.
What are the rules for current, p.d. And resistance in a parallel circuit?
Current into a junction is the same as out of a junction, so it can split up and join together.
p.d. Is the same for parallel parts of a circuit.
The total resistance is always lower than individual resistors in parallel.
