Question

An electron and a proton moving with the same speed enter the same magnetic field region at right angles to the direction of the field. For which of the two particles will the radius of circular path be smaller? [HOTS]

Answer 1

Explanation:

So both will have opposite spins. Due to equal charges

the only thing remains is the mass. The less the inertia the less the smaller the radius. So as electron has dramatically less mass than that of proton, electron will have a smaller radius.