Question

A certain wire has a resistance r. what is the resistance of a second wire, made of same material, that is half as long and has half diameter?5) specific resistance of copper, silver and constantan are 1.8x 10minus 6 ohm cm, 1 x 10minus6 ohm cm and 48 x 10minus5 ohm cm respectively. which is the best electrical conductor and why?6) what is the resistivity of a wire of 1 mm diameter, 2 m length and 50 x 10minus3 ohm resistance?

Answer 1

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