The circuit opposite shows three bulbs placed in series. This is a called a series circuit. Current flows through each of the bulbs in sequence. Current flows through bulb A, then bulb B and finally bulb C. The more bulbs that are added, the less bright they shine. It is possible to added so many bulbs that they do not light at all. This is due to the resistance in each bulb. If any of the bulbs fail, current cannot flow through the circuit and the other components will not work.
The circuit (right and left) is another example of a series circuit. When the switch is turned on current flows through the bulb first, then the solenoid and last the motor. This causes the bulb to light, the solenoid to be activated and the motor’s spindle to rotate. However, the more components that are added in series means the less current is available for all. Eventually, each component will fail to work as too much current is being drained from the circuit.
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