David Privett 10CK
Science Coursework:
Investigation of Resistance in a Nichrome 32 Wire
Introduction:
In this project I will be investigating how the length of Nichrome wire will affect the resistance. All length, cross section area, temperature and type of material are the factors that affect resistance. I will be keeping these variables constant besides length. To carry out this experiment I will set up a simple circuit and carry out a series of trials measuring voltage and current using different lengths of wire.
Prediction:
I predict that when the length of the Nichrome 32 wire is increased the resistance will also increase equally. The resistance increases as the length increases because the electrons that are passing through the wire collide with the metal atoms of the wire. The more you increase the length of the wire, the more collisions there will be between the metal atoms and electrons. The collisions that occur produce heat energy which is caused by friction. I predict that if you double the length of the wire the resistance will also double.
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Peer Reviews
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Quality of writing
The presentation of the essay is professional with a nicely done title page and clear text. The subheadings and paragraphing is also to a good standard with the essay following a clear route. The method and equipment are well organised in a bullet point form with a diagram to back it up. Punctuation, grammar and spelling are all to a high level.
Level of analysis
The introduction and fair test section are well constructed. They set out what the candidate is going to do concisely and clearly and the candidate explains why certain factors are kept the same effectively and how they are going to do this with good scientific terms. The prediction is explained well and is backed up with well explained scientific theory. The evaluation, conclusion and fair test sections are missing. The candidate carries out preliminary work which is good to give the candidate an idea of what the results should be like and make adjustments if anything other than what the candidate has considered affects the experiment. Graphs are well presented. Decimal places used in the table are consistent which is needed for accurate evaluations.
Response to question
Response to the question is done well. The candidate misses certain parts out which has affected how well we can assess this essay but from the depth of scientific consideration present and the presentation of the essay and results the candidate has performed the response to the experiment to a high standard.
