Question

a beam of alpha particles move towards north in a magnetic field which is towards east. what is the direction of force experienced by the alpha particles?

Answer 1

$$\begin{gathered} \mathrm{Force}\mathrm{acting}\mathrm{on}\mathrm{the}\mathrm{charged}\mathrm{particle}: \\ \mathrm{F}=\mathrm{q}\left(\overrightarrow{\mathrm{v}}\times \overrightarrow{\mathrm{B}}\right) \\ \mathrm{The}\mathrm{direction}\mathrm{of}\mathrm{force}\mathrm{is}\mathrm{perpendicular}\mathrm{to}\mathrm{the}\mathrm{plane}\mathrm{containing}\mathrm{the}\mathrm{vectors} \\ \mathrm{representing}\mathrm{velocity}\mathrm{and}\mathrm{magnetic}\mathrm{field}. \\ \mathrm{Ans}: \\ \mathrm{Perpendicular}\mathrm{to}\mathrm{the}\mathrm{plane}\mathrm{containing}\mathrm{velocity}\mathrm{and}\mathrm{magnetic}\mathrm{field}. \end{gathered}$$