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Factors Influencing Resistance of a Wire

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  • Essay length: 3094 words
  • Submitted: 30/06/2009
  • Reviewed by: (?) pratstercs
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GCSE Forces and Motion

Peer review rating

3 star(s)

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The first 200 words of this essay...

Planning

Investigation

In this piece of coursework I will be investigating what factors affect the resistance of a piece of wire; Nichrome to be exact which is a metal alloy. I believe resistance will depend on four different factors, the length, thickness, type of wire as well as the temperature of the wire.

Scientific Knowledge

Nichrome, like all metals or indeed substances is made up of atoms. Atoms are the smallest particle that we separate by using scientific techniques. These atoms however are composed of three different types of smaller particles. Every atom has a nucleus and in it there are two types of particles, protons which are positively charged and neutrons which have no charge. Circling the atom are shells which contain electrons. Electrons have a negative charge. If an atom's nucleus were as large as a ping pong ball the first shell of electrons would be 1 kilometre away.

In solids like Nichrome the atoms have strong bonds that join the atoms together and as a result, they are tightly packed and could look like something like the picture below.

The bonds of atoms join the atoms together in a specific

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Review of essay

Reviewed by: pratstercs

Rating: 3 star(s)

Response to the question

Overall, a good report in terms of physics, but lacks in evidence of analytical skills. You have started with good, well explained predictions. You have conducted a good experiment and detailed every step, which shows the development of your ideas as well as showing any problem areas in conducting the experiment. You have collected your results then analysed them into a conclusion bringing your predictions, results and explanation together to show you know what you are doing for the experiment.

Level of analysis

You have gone into a large amount of detail in explaining your prediction, some of which is not necessary. Removing some of the basics, such as “atoms are the building blocks of everything” would help show you can decide what is important and what is needed for the report. Leaving such basic information in says to a reader that you cannot analyse the information enough to choose what to put it and what not to. Keep your report to the information that is specific to the topic and what you have learned in conducting it. You have analysed the results to get to your conclusion, which shows off your analytical skills. However, you also repeat a lot of your information, which doesn’t show you can develop ideas without repeating yourself.

Quality of writing

Your level of English is of a mediocre standard, but you have used rather clunky sentences occasionally. You need more commas in your text, and when you have used commas, you have used them incorrectly or used them in a way that doesn’t improve the sentence. You have also used some technical language such as the names of the different atomic structures. These overcomplicate the report and do not add anything positive to the piece.

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