A wire of given material having length land area of cross-section A has a resistance of 4 1. What would be the resistance of another wire of the same material having length 1/2 and area of cross-section 2A?
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Resistance of a wire= rho l A
where
rho = resistivity of the material A = Area of cross-section of wire
It is given that R = 4Omega
I = Iengtl of the wire
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