What is the wire of the resistance, if the wire diameter is doubled?

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Posted Fri 13th April, 2012 @ 16:39 by prasanna

1 Answer

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Resistance = Resistivity x length/Area
Cross-sectional Area of a wire = 2 x pie x r^2 (2.pie.r square)
If diameter is = r/2, and if its doubled, 2d = 2 x r/2 = r
So the area will change..And from that you can calculate the resistance :)

Answered Mon 30th April, 2012 @ 04:50 by Shiva