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How does the length of wire affect its resistance...?
Member rating: No Rating | Words: | Submitted: Mon Apr 05 2004
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How does the length of wire affect its resistance...? Aim: Conduct an experiment to investigate how changing the length of a length of wire affects its resistance Section 1... Planning (8 marks) Method... I will build the following circuit Theory... There are four things that affect the resistance of a piece of wire • Length • Area • Temperature • Material In this experiment I will change the length, whilst keeping the other factors (area, temperature and material) constant I will also keep the wire straight to make the length measurement more accurate Prediction... An electric current is a flow of electrons along a length of wire. The electrons have a negative charge, these move past ions which have a positive charge. There is an attractive force between the charges and ions, so they tend to stop flowing, so energy has to be supplied to keep the electrons flowing The longer the piece of wire the greater the resistance, because the electrons have got to push past more...
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