Resistivity coursework a level
However, due to my line of enquiry, I will only change the length of the wire. A measure for greatness: Resistance of constantan wire coursework, review Rating: 83 of based on votes.
Graph Graphing these results shows a nearly straight line, illustrating a strong positive correlation between length and resistance, which is consistent with my prediction. Experiment to determine the resistance of a wire — TecHKnow Wiki Investigating the resistance of wires The circuit I used looked like this:.
AS level material below, potentially useful for coursework! Resistivity ; Length of the wire; Cross-sectional area; Temperature of the wire. Another factor that will affect which wire I choose will be the cross-sectional area of the wire, because I only have wires that are 28 or 26 swg, except for constantan, which is 36 swg, and the resistance will be affected too much by the wire heating up.
Expression for resistivity
Variables There are different variables that can be changed in this experiment; these are the independent variable. I will try to make this investigation as accurate as possible. AS level material below, potentially useful for coursework! To support my prediction and conclusion, I could do further experiments. This confirms the first part of my prediction: that the longer the wire the larger the resistance. Next, I will set the power pack on the lowest voltage possible to ensure that the current passing through the circuit isn't too high which could potentially affect the results because the wire would get too hot. However, due to my line of enquiry, I will only change the length of the wire. National Electrical Manufacturers Association. Investigating the resistance of wires The circuit I used looked like this:. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack. Because of this constantan, coursework the tendency for premature grid failure with repeated straining, P alloy is not ordinarily recommended for cyclic strain applications. Again, I will record the voltmeter and ammeter readings and turn off the power pack. This is how my experiment will be set up: My equipment will be: This is how we will work our experiment:.
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