Physics · 2019
JEE Main · 10 April 2019, Shift 1 · Q18
A current of 5 A passes through a copper conductor (resistivity =1.7 × 10^-8 Ω m ) of radius of cross-section 5 mm. Find the mobility of the charges…
A current of $\displaystyle 5$ A passes through a copper conductor (resistivity $\displaystyle =1.7 \times 10^{-8} \Omega \mathrm{~m}$ ) of radius of cross-section $\displaystyle 5$ mm . Find the mobility of the charges if their drift velocity is $\displaystyle 1.1 \times 10^{-3} \mathrm{~m} / \mathrm{s}$.
Official answer
(3)
$\displaystyle 1.0 \mathrm{~m}^2 / \mathrm{Vs}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.