Question

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2 wires made of copper and nichrome have equal length and equal resistance. which is thicker??given that resistivity of nichrome is greater than resistivity of copper..
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Answer 1

Since resistivity ( rho ) is directly proportional to area of cross section of a wire, the resistivity will increase if the area of the cross section increases.
Here, resistivity of nichrome is greater than copper. So, nichrome will be more thicker than copper.

Answer 2

Nichrome has more resistivity than copper. Hence for equal length and resistance it has to to be thicker since resistance is inversely proportional to the diameter of the wire.

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