Question

When does a moving charged particle not experience any force while moving through a uniform magnetic field?

Answer 1

The magnetic force on a charged particle is given by: $q(\overrightarrow{v}\times \overrightarrow{B})$.

So, Charge particle does not experience any force when it is moving parallel to the uniform magnetic field as $\overrightarrow{v}$ and $\overrightarrow{B}$ will be in same direction.