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MHT CET 2026 (16 Apr, Shift 1) · Moving Charge in a Magnetic Field

Moving Charge in a Magnetic Field question from MHT CET 2026 (16 Apr, Shift 1)

Q10MHT CET 2026 · 16 APR · SHIFT 1Medium

Moving Charge in a Magnetic Field

A charged particle is moving in a uniform magnetic field in a circular path of radius 'R'. When the energy of the particle becomes 3 times the original, the new radius will be

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Answer: (c)

Radius $r = \dfrac{mv}{qB} = \dfrac{\sqrt{2mK}}{qB}$ , so $r \propto \sqrt{K}$ for the same particle and field.
$K' = 3K \Rightarrow r' = \sqrt{3}\,R$
So the answer is (c) $\sqrt{3}R$ .

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