There are no anomalous results that I would consider to be far away from the line of best fit. When using a power supply, high currents will cause the safety cut-out on the power packs to automatically switch it off.
Apparatus and materials Cells, 1. Also, there is more space for the electrons to flow, so more can fit down. However, I made sure that the wire remained straight throughout the experiment. I will try to make this investigation as accurate as possible.
Again, I will record the voltmeter and ammeter readings and turn off the power pack. As shown by the equation, knowing the length, cross-sectional area and the material that a wire is made of and thus, its resistivity allows one to determine the resistance of the wire.
There are a few data points that are farther away from the line of best fit than the others, but they are still consistent with the general trend.
I will also ensure that there is a clear indication that the power is isolated by means of a switch and an L. It could overheat and thus lead to the risk of fire. This is often compared to water in a pipe; the thicker the pipe, the more water that can flow through it.
Those materials with lower resistivities offer less resistance to the flow of charge; they are better conductors. This is because there are more electrons in the metal that are free to move as a current.
For this reason, it is important to keep the current very low - copper wire is effectively a short. I will then turn the power pack on and record what voltmeter and ammeter readings. In either case, different wires should be made of the same material.
Variables Safety I will ensure experimental safety by confirming that all the wires are connected properly and that none of the insulation on the wires is worn.
However, due to my line of enquiry, I will only change the length of the wire. This confirms the first part of my prediction: This experiment was safety-checked in August Selection of reels of Eureka wire also known as Constantan or Contra of different gauges, e.
The colors reveal information about the resistance value. Class practical A simple investigation of the factors affecting the resistance of a wire. Class practical A simple investigation of the factors affecting the resistance of a wire.
This experiment can be used as a more open-ended investigation. Students can select the variables, the ranges of results and the equipment used. The amount of. Apr 19, · An investigation into the resistance of a wire.
Free GCSE physics coursework essay.
There are different variables that can be changed in this experiment; these are the independent variable. However, due to my line of enquiry, I will only change the length of the wire. The variables I will control will be the type of wire (resistivity) and Reviews: Apr 19, · Free GCSE physics coursework essay.
STEM» Physics; An Investigation Into the Resistance of a Wire - GCSE Physics Coursework. Updated on December 30, Luno more. Contact Author. Introduction. In this article I will investigate what affects the resistance of a wire.
I have done a preliminary experiment to help me decide the Reviews: Mar 11, · Hi, I have decided for my advanced level coursework to investigate whether the specific heat capacity of a few metals affects their resistivity in any way.
(prob in a circuit) I am at the stage of planning and i have less than a week to complete this stage. I have a few ideas about measuring.
From this I know that the resistance of 20cm wire should be double the resistance of the 10cm wire and the 40cm wire double that of the 20cm wire, etc. Experiment 1 Length Amps Volts Resistance (+ 1cm) After obtaining my results from the experiments I plotted 3 graphs showing these and also another graph showing the average results.
Essays-SCIENCE COURSEWORK: RESISTANCE OF WIRE EXPERIMENT. Risk Assessment To keep the experiment safe I shall keep electrical conductors away from the plug sockets.Resistance experiment coursework