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Physics · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 3 · Q5
A charged particle is moving in a uniform magnetic field B with a constant speed v in a circular path of radius r. Which of the following graphs…
A charged particle is moving in a uniform magnetic field $\displaystyle \overrightarrow{\mathrm{B}}$ with a constant speed v in a circular path of radius r. Which of the following graphs represents the variation of radius of the circle, with the magnitude of magnetic field $\displaystyle \overrightarrow{\mathrm{B}}$ ?
Official answer
(B)
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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.