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Changing circuits

Adding more batteries to a simple circuit will increase the electrical energy, which will make a bulb brighter.

More bulbs

Adding more bulbs to a simple circuit will reduce the electrical energy and make the bulbs dimmer.

Longer wires

Lengthening the wires in a simple circuit will reduce the electrical energy, as it has further to travel. The extra distance will make the bulb dimmer.

Adding a motor

If electrical energy is flowing around the circuit, the motor will rotate.

Diagram of a circuit showing a motor and a bulb connected in series

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