calculate the resistance of 2km long Cu wire of radius 2mm. resistivity of Copper 1.72 × 10-⁸
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Explanation:
As we know Resistance of wire
=(Resistivity*length of wire) /Area if cross section
=( 1.72*10^-8) *(2*1000meter) /{π/4*(.002m) ²}
= 11.33Ohm
Hope it'll help you..
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