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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. |
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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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