CBSE 2026 · Region 3 · Set 1 · Q14 · 1 mark
Assertion (A) : The cylindrical soft iron core in a moving coil galvanometer only makes the magnetic field radial and does not affect the strength of the magnetic field.
Reason (R) : In a moving coil galvanometer, the plane of the coil is always perpendicular to the magnetic field.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Both Assertion (A) and Reason (R) are false.
Moving Charges and MagnetismThe Moving Coil GalvanometerAnalyseassertion_reasonmedium
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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.