... current flowing through the circuit Voltmeter- to measure the voltage present in the circuit and to make sure the power supply is correctly calibrated. Power Supply- to act as the adjustable power source for the circuit Wires- to connect the circuit components. Tangles were removed from the wires as not doing so could result in erroneous values being obtained in experiment, as using several different wires or tangled wires during the experiment could lead to varied resistance and poor fair test (Figure 6). Safety Precautions Bags stools and other possible obstructions were removed from gangway. Worktops were cleaned and dried to reduce risk of electrocution and prevent damage or interference to experimental equipment. Standard lab safety protocol was enforced. In order to keep errors to minimum and to ensure fair test, parameters such as wires, voltmeters, ammeters, resistors, PSU's and filament lamps remained the same throughout the experiment. Scientific Knowledge Electricity flows due to electron ...

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