Back to category: Science Limited version - please login or register to view the entire paper. What affects the resistance of a wire? Investigation (GCSE coursework) What affects the resistance of a wire? I am going to find out what affects the resistance of a wire. To calculate the resistance I have to do: FORMULAE 1: voltage divided by the current; V/I. FORMULAE 2: electrical resistivity = (electrical resistance × cross-sectional area) ÷ longitudinal length. Apparatus Power supply 1 metre rule (in cm) Voltmeter- 0 to 5 volts, 10 divisions every volt. Ammeter- 0 to 1 amp, 0.05 amps. Heatproof mat. Variable resistor. Length of wire (3m) Variables Temperature might affect the resistance of a wire. Thickness might affect the resistance of a wire. Length might affect the resistance of a wire. Density might affect the resistance of a wire. What the wire is made out of might affect the resistance of a wire. (... Posted by: Asare Mabel Limited version - please login or register to view the entire paper. |
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