CBSE 2025 · Region 3 · Set 1 · Q19 · 1 mark
Assertion $\displaystyle (A)$ : Magnetic field lines around a bar magnet never intersect each other. Reason $\displaystyle (R)$ : Magnetic field produced by a bar magnet is a quantity that has both magnitude and direction.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Magnetic Effects of Electric CurrentMagnetic Field and Field LinesAnalyseassertion_reasonmedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.