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Physics Coursework Theory - Resistance of a Wire

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Issue:

Science

 

Written by:

Patrick M

 

Date added:

February 3, 2015

 

Level:

College

 

Grade:

A

 

No of pages / words:

1 / 262

 

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3431 times

 

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This is because there are more electrons in the metal that are free to move as a current. Also, there is more space for the electrons to flow, so more can fit down. This is often compared to water in a pipe; the thicker the pipe, the more water that can flow through it. Temperature The temperature of the wire also affects the resistance...
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This happens because as the metal gets warmer, the metal ions in the wire gain kinetic energy and start to vibrate. As their motion becomes more erratic they are more likely to get in the way and disrupt the flow of the electrons and therefore increase the resistance. Length of the wire This is easier to explain using the "hallway" analogy...
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General issues of this essay:
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