Physics - Magnetism Question with Solution | TestHub

When a charged particle $q$ is moving in a uniform magnetic field $\overrightarrow{\mathbf{B}}$ with velocity $\overrightarrow{\mathbf{v}}$ such that angle between $\overrightarrow{\mathbf{v}}$ and $\overrightarrow{\mathbf{B}}$ be $\theta$, then due to interaction between the magnetic field produced due to moving charge and magnetic force applied, the charge $q$ experiences a force which is given by $F=qvB\sin \theta$ If $\theta =0^{\circ }$ or $180^{\circ }$, then $\sin \theta =0$ $\therefore F=qvB\sin \theta =0$ Since, force on charged particle is non-zero, so angle between $\overrightarrow{\mathbf{v}}$ and $\overrightarrow{\mathbf{B}}$ can have any value other than zero and $180^{\circ }$. Note : Force experienced by the charged particle is Lorentz force.