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# How Does the Length of Wire Effect its Resistance?

Extracts from this document...

Introduction

Middle

0.86

## From my repeat I can see that something has gone wrong so I will again do a repeat to see which of my results is correct.  Even though they both show my prediction to be correct I need to see if when the current is

Conclusion

My results my not be totally accurate but they do show how resistance changes when varying the length of a piece of metal wire.  I do think that they are good enough to draw some firm conclusions from, as there are not any anomalous results which means that they are most likely to be correct.

The results I have gathered are reliable, as they do not show anything, which you would not expect, but they do show what happens to resistance when varying the metal wire’s length clearly so could be said to be accurate.

Even though this is said I could do more to make sure that the results are as reliable as possible by next time getting 8 metres of new wire and taking more thickness’ to make sure that they wire was the same width all the way along.

To find out more about this variable and how it effects the resistance you could do half metres and work out how the resistance varies between lengths so giving you a more advanced knowledge of how temperature effects resistance.  This could help if you wanted to find an equation linking resistance with length when not wanting to have to measure everything.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

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# Related GCSE Electricity and Magnetism essays

1. ## To alter the length of wire and measure the effect on the resistance.

Resistance = voltage/current. Temperature If the wires temperature is higher, its atoms vibrate more, each one moving around a fixed centre. There is more chance of the electrons colliding with the vibrating atoms, so less current can flow. An increase in temperature increases the resistance of a wire.

2. ## Investigating resistance when altering thickness of wire / length of wire

In experiment 2, the length will need to be kept constant to make sure only the variables indicated are investigated to ensure a fair test. Metals conduct electricity because the atoms in them do not hold on to their electrons very well, and so creating free electrons, carrying a negative

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