1.

1 kg piece of copper is drawn into a wire of cross-sectional area 1 mm2, and then the same wire is remoulded again into a wire of cross-sectional area 2 mm2. Find the ratio of the resistance of the first wire to the second wire.

Answer»

1 kg piece of copper is drawn into a wire of cross-sectional area 1 mm

2

, and then the same wire is remoulded again into a wire of cross-sectional area 2 mm

2

. Find the ratio of the resistance of the first wire to the second wire.




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