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Physics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 3 · Q4
A square loop of side L lies in the x-y plane in a magnetic field B = B_0(2 i +3 j +4 k ), where B_0 is a constant. The magnetic flux through the…
A square loop of side L lies in the x-y plane in a magnetic field $\displaystyle \overrightarrow{\mathrm{B}}=\mathrm{B}_{0}(2 \hat{\mathrm{i}}+3 \hat{\mathrm{j}}+4 \hat{\mathrm{k}})$, where $\displaystyle \mathrm{B}_{0}$ is a constant. The magnetic flux through the loop is :
Official answer
(B)
$\displaystyle 4 \mathrm{~B}_{0} \mathrm{~L}^{2}$
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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.