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Question: Answered & Verified by Expert
When a charged particle moving with velocity $\vec{v}$ is subjected to a magnetic field of induction $\vec{B}$, the force on it is non-zero. This implies that:
PhysicsMagnetic Effects of CurrentJEE Main
Options:
  • A angle between is either zero or $180^{\circ}$
  • B angle between is necessarily $90^{\circ}$
  • C angle between can have any value other than $90^{\circ}$
  • D angle between can have any value other than zero and $180^{\circ}$
Solution:
2678 Upvotes Verified Answer
The correct answer is: angle between can have any value other than zero and $180^{\circ}$
$$
\begin{aligned}
\vec{F} & =q(\vec{V} \times \vec{B}) \\
& =q v B \sin \theta
\end{aligned}
$$
Therefore when $\theta=0^{\circ}$ or $\theta=180^{\circ}$
$$
F=0
$$

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