CBSE 2026 · Region 2 · Set 2 · Q9 · 1 mark

A straight conductor lies along $\displaystyle x$-axis and carries a current of $\displaystyle 2$ A along $\displaystyle +x$ direction. The magnetic field at a point ($\displaystyle 0$, $\displaystyle 40$ cm, $\displaystyle 0$) due to $\displaystyle 1$ cm length of conductor centered at the origin points along.

CBSE Class 12 Physics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.