Physics · 2021
JEE Main · 24 February 2021, Shift 2 · Q27
A cylindrical wire of radius 0.5 mm and conductivity 5 × 10^7 S / m is subjected to an electric field of 10 mV / m. The expected value of current in…
A cylindrical wire of radius $\displaystyle 0.5$ mm and conductivity $\displaystyle 5 \times 10^7 \mathrm{~S} / \mathrm{m}$ is subjected to an electric field of $\displaystyle 10 \mathrm{mV} / \mathrm{m}$. The expected value of current in the wire will be $\displaystyle x^3 \pi \mathrm{~mA}$. The value of $\displaystyle x$ is \_\_\_\_.
Official answer
5
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