GCSE Physics


This section describes circuits - electric "machines".

A circuit is a loop of wire with its ends connected to an energy source such as a cell* or a battery*.

One end of the wire is connected to the positive terminal; the other end of the wire is connected to the negative terminal. The wire is connected in this way so a current* can flow through it.

Having connected our circuit, we can use it to light an electric lamp, to run an electric motor, to heat an electric element* and so on.

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