The Resistance of a lead Graphite line.

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The Resistance of a lead Graphite line

A measurement of lead graphite will be measured out on a piece of a4 paper I will be measuring the length and width of the strip of graphite I will draw out, I will be using a 2B pencil to make the experiment fair, I will also be using grid paper to make the measurements more precise. I will start at having a twenty-centimetre line by one centimetre line however I will be widening the length and width of the line and I will read the ohmmeter on every centimetre of the graphite line that I move the two jockeys to measure the resistance of the carbon track using the 20k settings to measure in mega ohms. I will take reading from every one centimetre three times in order two find the average and so to make it a fair test. I will be using jockeys in order to control the distance in which the current will flow.  I will also use an ohmmeter once I have connected it to the carbon track so that I can use the results it shows and take them down. I am doing this experiment to find how variable the resistance is in the carbon track depending on length and width. The factors affecting my experiment will be the length and width so theses will be the two factors I will be placing my results on. Spreading electrons so the longer the carbon track or distance the more the electrons will spread causes resistance. Also the wider the carbon track the more parallel circuits that and so the spreading becomes greater.

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Theory

Electron scattering causes electrical resistance, the longer or larger a piece of material the larger the scattering and so the larger the resistance. In creating a wider or longer carbon track is creating more parallel circuits along side each other.  

My prediction

“As the length of the carbon track increases the resistance will also proportionally increase”  

“As the width increases the resistance will then proportionally decrease”

My reasons are explained in my theory

I am also going to make sure throughout the experiment that when I increase the length I will not interfere with the width ...

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