Rankers Physics

Uncategorized: Practice Problem & Solution

38. 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: (2006)
Angle between $\vec{v}$ and $\vec{B}$ is necessarily $90^\circ$
Angle between $\vec{v}$ and $\vec{B}$ can have any value other than $90^\circ$
Angle between $\vec{v}$ and $\vec{B}$ can have any value other than zero and $180^\circ$
Angle between $\vec{v}$ and $\vec{B}$ is either zero or $180^\circ$

Solution Explained:

To solve this problem, we apply the core principles of Uncategorized. Understanding the underlying formula is key to arriving at the correct answer below:

Force is $F = qvB\sin\theta$. For a non-zero force, $\sin\theta \neq 0$, meaning the angle cannot be $0^\circ$ or $180^\circ$, allowing any other value.

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