CBSE 2023 · Region 5 · Set 1 · Q18 · 1 mark

Assertion (A) : The deflecting torque acting on a current carrying loop is zero when its plane is perpendicular to the direction of magnetic field. Reason (R) : The deflecting torque acting on a loop of magnetic moment $\displaystyle \vec{m}$ in a magnetic field $\displaystyle \vec{B}$ is given by the dot product of $\displaystyle \vec{m}$ and $\displaystyle \vec{B}$.

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.