Physics - Magnetism Question with Solution | TestHub

An$\mathrm{\alpha }$-particle and a proton are both simultaneously projected into a region of a constant magnetic field, perpendicular to the direction of the field but in opposite directions. After${10}^{-8} \mathrm{s}$, it is found that the velocity of$\mathrm{\alpha }$-particle has changed in the direction by$45°$. The angle between the velocity vectors of the$\mathrm{\alpha }$-particle and the proton is