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Essay

Resistance of a wire

Essay specific features

 

Issue:

Science

 

Written by:

David W

 

Date added:

January 16, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 316

 

Was viewed:

1182 times

 

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Essay content:

I will work out resistance in ohms by using Ohms Law which is the formula shown below: R = V ?? I Resistance (in ?¶) = Voltage (in Volts) ?? Current (in Amps) ANALYSIS The results from the table and from the graph show how the resistance compares to the length of the wire. From my graph it is clearly seen that there is a very positive correlation, this shows that the longer the wire the higher the resistance, the results obtained are directly proportional, I can see this if I do a couple of simple calculations...
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I will take the average resistance for 40cm wire and the average of resistance of the wire twice the length i.e. 80cm. Resistance of wire of 40cm = 1.8 Ohms Resistance of wire of 80cm = 3.63 Ohms 3.63 / 1.8 = 2.016 ohms The resistance of 80cm wire is double the resistance of 40cm wire. This proves my prediction where I said that the longer the wire the greater the resistance, and it also proves what I said about the results being directly proportional ie if the wire is twice as long the resistance is twice as great...
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