A charge Q is moving dl distance in the magnetic field B. Find the value of work done by B. (a) Zero (b) - 1 (c) Infinite (d) 1

Answer: (a). dW = F · dl = Q(v × B) · v dt v × B is perpendicular to v, so dW = 0. So the answer is (a) zero.

A charge Q is moving dl distance in the magnetic field B. Find the… | JEE Main 2021 (16 Mar, Shift 2)

Q64JEE Main 2021 · 16 MAR · SHIFT 2Easy

Moving Charge in a Magnetic Field

A charge Q is moving $\overrightarrow{dl}$ distance in the magnetic field $\vec{B}$ . Find the value of work done by $\vec{B}$ .

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Answer: (a)

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