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# Objective: to investigate how the rate of resistance is affected by the different thicknesses (gauges) and the lengths of the wires.

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• Essay length: 3889 words
• Submitted: 13/02/2012
GCSE Electricity and Magnetism

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Science Coursework: Resistance Of Wire

Objective: to investigate how the rate of resistance is affected by the different thicknesses (gauges) and the lengths of the wires.

Theory Of Resistance Of Wire

What is V/I=R? V/I=R is the scientific theory behind resistance. This formulae can be also used as V=I*R meaning the same thing. What do they mean? V/I=R meaning voltage (V) + current (I) = resistance. Both current and voltage are measured similarly to each other by two dissimilar electrical measuring equipment. Voltage is measured by a voltmeter while current is measured by an ammeter. Current is the motion of electrons in a circuit. While voltage is the potential difference in a circuit. The circuit is simple to set up. But to make the circuit work you have to place the components in the correct positions or the current or electricity will not flow continuously. The voltmeter will be placed in the circuit opposite the component in parallel and the ammeter will be placed in series in the circuit anywhere. Ohms Law is a mathematical equation that displays the correspondence between Voltage, Current and Resistance in an circuit. The unit resistance is measured in, is Ohms

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