Lamps in Parallel

If several lamps are connected in parallel each one has the full supply voltage across it. The lamps may be switched on and off independently by connecting a switch in series with each lamp as shown in the circuit diagram. This arrangement is used to control the lamps in buildings.

This type of circuit is often called a parallel circuit but you can see that it is not really so simple - the switches are in series with the lamps, and it is these switch and lamp pairsthat are connected in parallel.

Lamps in parallel
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