In science, year 6 have been investigating whether the number of components in a circuit affects the output. To ensure this was a fair test we had a control test, which consisted of a battery, wires and a light bulb, and made sure only one variable was changed throughout the investigation: the number of bulbs. We noticed that as we added more bulbs, the dimmer they got. This is because the more components you have, the more resistance there is in the circuit.
