You need to produce a set of cylindrical copper wires 3.50 m long that will have a…
Physics · JEE Main · NTA Exams — Current Electricity
You need to produce a set of cylindrical copper wires 3.50 m long that will have a resistance of \(0.125 \Omega\) each. What will be the mass (in gram) of each of these wires? Given that resistivity of copper is \(1.72 \times 10^{-8} \Omega-\mathrm{m},\) density of copper \(=8.9 \times 10^{3} \mathrm{~kg} / \mathrm{m}^{3} .\)
- 7 gm
- 11 gm
- 15 gm
- 20 gm
Answer
(C) 15 gm
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