When a charged particle moving with velocity v is subjected to a magnetic field of induction B, the force on it is non-zero. This implies that (a) angle between is either zero or 180° (b) angle between is necessarily 90° (c) angle between can have any value other than 90° (d) angle between can have any value other than zero and 180°.

Answer: (d). F = qvBsin θ is zero only when sin θ = 0, i.e. θ = 0° or 180°. Non-zero force means θ can be anything except 0° and 180°. So the answer is (d).

When a charged particle moving with velocity v is subjected to a… | NEET 2006 (AIPMT)

Q115NEET 2006 · AIPMTEasy

Moving Charge in a Magnetic Field

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

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Answer: (d)

$F = qvB\sin\theta$ is zero only when $\sin\theta = 0$ , i.e. $\theta = 0^\circ$ or $180^\circ$ .
Non-zero force means $\theta$ can be anything except $0^\circ$ and $180^\circ$ .
So the answer is (d).

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