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Physics · 2024 · 1 mark
CBSE 2024 · Region 1 · Set 3 · Q3
In a uniform straight wire, conduction electrons move along +x direction. Let E and j be the electric field and current density in the wire,…
In a uniform straight wire, conduction electrons move along +x direction. Let $\displaystyle \overrightarrow{\mathrm{E}}$ and $\displaystyle \overrightarrow{\mathrm{j}}$ be the electric field and current density in the wire, respectively. Then :
Official answer
(B)
$\displaystyle \overrightarrow{\mathrm{E}}$ and $\displaystyle \overrightarrow{\mathrm{j}}$ both are along -x direction.
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CBSE Class 12 Physics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.