Physics coursework on resistance of a wire

Theory What is resistance? Electricity is conducted through a conductor, in this case wire, by means of free electrons.

Physics coursework on resistance of 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.

Physics Coursework Theory - Resistance of a Wire - Essay - Andrew

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.Physics Coursework Objective: My objective in this experiment is to investigate one of the factors that affect the resistance of a piece of wire; the one I am investing is the length at constant temperature.

GCSE Physics Coursework - Resistance of a Wire Coursework Resistance of a Wire Task To investigate how the resistance of a wire is affected by the length of the wire.4/4(1). Jan 08,  · I am currently doing my Physics coursework and i was just wondering if you could help me get a bit more scientific information on why things occured and happened the way they did.

Basically i am studying how length affects the resistance of a wire and i have initially completed this project but i am just re-reading and adding in Status: Resolved.

Apr 19,  · I will investigate the resistance of a wire in relation to its length. Prediction. I predict that the longer the wire, the larger the resistance.

Physics coursework on resistance of a wire

This is because the free electrons in the wire bump into more atoms, thereby making it harder for electricity to initiativeblog.coms: Jan 08,  · Physics Coursework - Resistance of a wire?

I am currently doing my Physics coursework and i was just wondering if you could help me get a bit more scientific information on why things occured and happened the way they initiativeblog.com: Resolved.

Regardless of your deadline, budget, specifications, or academic level, we can provide immediate help for your physics resistance GCSE coursework essay, term paper, book report, research paper, dissertation, thesis, or university coursework.

Physics Coursework - Resistance of a wire? | Yahoo Answers