JEE Main 2022 Physics question
A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is :
Answer: (3)
Solution
r = mv/(qB). So = (4/2)/(1/1) = 2, i.e. 2 : 1.