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Physics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 3 · Q10
A circular loop has radius R and carries current I as shown in figure. In order that the net magnetic field at the centre of the loop is zero, the…
A circular loop has radius R and carries current I as shown in figure. In order that the net magnetic field at the centre of the loop is zero, the current in wire AB should have magnitude
Official answer
(A)
$\displaystyle 2 \pi \mathrm{I}$, along +X - axis
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.