The cell stores chemical energy and transfers it to electrical energy when a circuit is connected.
When two or more cells are connected together we call this a Battery.
The cells chemical energy is used up pushing a current round a circuit.
An electric current is a flow of microscopic particles called electrons flowing through wires and components.
In which direction does the current flow?
from the Negative terminal to the Positive terminal of a cell.
Here is a simple electric circuit. It has a cell, a lamp and a switch.
To make the circuit, these components are connected together with metal connecting wires.
When the switch is closed, the lamp lights up. This is because there is a continuous path of metal for the electric current to flow around.
If there were any breaks in the circuit, the current could not flow.
Scientists usually draw electric circuits using symbols;
In circuit diagrams components are represented by the following symbols;
There are two types of electrical circuits;
The components are connected end-to-end, one after the other.
They make a simple loop for the current to flow round.
If one bulb ‘blows’ it breaks the whole circuit and all the bulbs go out.
The current has a choice of routes.
The components are connected side by side.
If one bulb ‘blows’ there is still be a complete circuit to the other bulb so it stays alight.