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JEE MAIN 2023
8-4-2023 S2
Question
The number density of free electrons in copper is nearly $8 \times 10^{28} \mathrm{~m}^{-3}$. A copper wire has its area of cross section $=2 \times 10^{-6} \mathrm{~m}^2$ and is carrying a current of 3.2 A . The drift speed of the electrons is $\_\_\_\_$ $\times 10^{-6} \mathrm{~ms}^{-1}$.
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