Question

What will be the path of a charged particle moving along the direction of a uniform magnetic field?

Answer 1

When a charge passes through a magnetic field, it experiences a force called Lorentz Force

$=qVB\sin \theta$

When the charge particle moves along the direction of a uniform magnetic field$\theta =0°\text{or}180°$

$\therefore F=qVB\left(0\right)=0$

Thus the charged particle would continue to move along the line of magnetic field.i.e, straight path.