CBSE 2023 · Region 1 · Set 3 · Q2 · 1 mark

A steady current flows through a metallic wire whose area of cross-section (A) increases continuously from one end of the wire to the other. The magnitude of drift velocity $\displaystyle \left(\mathrm{v}_{\mathrm{d}}\right)$ of the free electrons as a function of 'A' can be shown by :

A

B

C

D

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CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.