Physics - Magnetism Question with Solution | TestHub

A particle of charge$q$and mass$m$is projected with a velocity$V_0$towards a circular region having uniform magnetic field$B$perpendicular and into the plane of paper from point$\mathrm{P}$as shown in the figure.$R$is the radius and$\mathrm{O}$is the centre of the circular region. If the line$\mathrm{O}\mathrm{P}$makes angle$\theta$with the direction of$V_0$, then the value of$V_0$so that particle passes through$\mathrm{O}$is -