Question

The figure shows a mixed source $S$ of alpha and beta particle in a thick container. The particles are passed through a magnetic field in a direction perpendicular to the plane of the paper (inwards as shown by x). State and show in the diagram how the particles get affected.

Answer 1

Ref. image I

$\alpha$ particles will experience no force so moves unaffected.

While $\beta$ particles are charged particles and will experience a force of $qvB$.

Direction of force can be determined by right hand rule,

Ref. image II

As a negative charge force will be acting on right-hand side.