Investigation into resistance of a wire (contains spaces for diagrams).

Coursework

An Investigation Into The Resistance of different lengths of wire

Intro

        In my coursework I stipulate to determine the relationship between immunity of a traffic circle and the length of a piece of wire.

Planning

Planning 1: Preliminary manoeuvre:

I performed preliminary work to evaluate what voltage I was sacking to custom for my proper experiment. The apparatus I will recitation for the preliminary is the kindred as I intend to use for my experiment, that is;

·         A 1000mm length of wire attached to a 1000mm ruler development a non conductive adhesive

·         2* Multimeters

·         5* Insulated wire connectors with corresponding 2*Crocodile clips.

·         1* Power pack with an ready(prenominal) output voltage of above 1v.

The disadvantage of apply the same apparatus for both experiments (preliminary and main) is that the wire degrades after use forming a layer of oxide over the wire which affords it difficult to connect on the crocodile clips due to the oxide not being conductive. The way to remove it is to gumption it off, but removing the oxide, and indeed inevitably part of the metal, will make the wire thinner, thus increasing the resistance of the wire. So I will be careful when removing any oxide residue.



The advantage of using the same apparatus consistently is that I will neutralise having differences in the results by way of inaccuracies in the measuring equipment, resistance differences of the wire etc. This gives 2 immediate advantages, firstly using results from a preliminary experiment e.g. using a rich wire and choosing 1.0V could be a mistake if I thence went on to use a thin wire in my experiment and cause a fire with 1.0V. The second is that I will be able to compare the results I buzz off in my proper experiment to the...

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