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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > You need to produce a set of cylindrical copper wires 2.5 m long that will have a resistance fo 0.125Ω each. What will be the mass of each of these wires? (Density of copper is 8.9 × 103 kgm^−3 and resistivity of copper is 1.72×10−8Ω M

You need to produce a set of cylindrical copper wires 2.5 m long that will have a resistance fo 0.125Ω each. What will be the mass of each of these wires? (Density of copper is 8.9 × 103 kgm^−3 and resistivity of copper is 1.72×10−8Ω M

In a hydrogen discharge tube the number of protons drifting across a cross section per second is 1.0×1018 while the number of electrons drifting in the opposite direction across the same cross section is 2.7 × 1018 per second. Find the current flowing in the tube.