Physics · 2022
JEE Main · 27 June 2022, Shift 1 · Q56
The current density in a cylindrical wire of radius 4 mm is 4 × 10^6 Am^-2. The current through the outer portion of the wire between radial…
The current density in a cylindrical wire of radius $\displaystyle 4$ mm is $\displaystyle 4 \times 10^6 \mathrm{Am}^{-2}$. The current through the outer portion of the wire between radial distances $\displaystyle \frac{R}{2}$ and $\displaystyle R$ is \_\_\_\_ $\displaystyle \pi \mathrm{A}$.
Official answer
48
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.