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fireman fireman
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11 years ago
Physics 2. The question is stated as : What length of copper wire(resistivity 1.68 x 10 ^ -8 ohms m ) of diameter .15 mm is needed for a total resistance of 15 ohms? I was wondering what is the formula, if there is one , for calculating this. Thanks guys
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wrote...
11 years ago
Resistance = Resistivity x (Length / Cross Sectional Area)

Cross Sectional Area = Pi x (r^2)
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