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Theory behind my experiment Thickness cross sectional area of the wire length and temperature all have some effect on the amount of resistance created in a wire Another factor is the conductivity of the material we are using Some metals are just more electrically conductive than others As long as I use the same type of metal for each wire my experiment will remain fair Cross Sectional Area The thicker the wire the less resistant it is This is because there are more electrons in the metal that are free to move as a current Also there is more space for the electrons to flow so more can fit down This is often compared to water in a pipe the thicker the pipe the more water that can flow through it Temperature The temperature of the wire also affects the resistance This happens because as the metal gets warmer the metal ions in the wire gain kinetic energy and start to vibrate As their motion becomes more erratic they are more likely to get in the way and disrupt the flow of the electrons and therefore increase the resistance Length of the wire This is easier to explain using the hallway analogy Imagine in a corridor there are some people electrons trying to move and there are some people ions staying still If the corridor was very short there is a high chance that the electrons will make it to the end If the corridor is very long there is more chance of the electrons colliding with an ion and therefore decreasing the amount of current
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