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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A uniform copper wire of mass 2.23 × 10^−3 kg carries a current of 1 A when 1.7 V is applied across it. Calculate its length and area of cross-section. If the wire is uniformly stretched to double its length, calculate the new resistance. Density of copper is 8.92 × 10^3 kg/m^3 and resistivity is 1.7 × 10^−8 Ω m

A uniform copper wire of mass 2.23 × 10^−3 kg carries a current of 1 A when 1.7 V is applied across it. Calculate its length and area of cross-section. If the wire is uniformly stretched to double its length, calculate the new resistance. Density of copper is 8.92 × 10^3 kg/m^3 and resistivity is 1.7 × 10^−8 Ω m

How many electrons per second pass through a section of wire carrying a current of 0.7 A?