Question

Assertion: A proton an an alpha particle having the same kinetic energy are moving in circular paths in a unifrom magnetic field. The radii of their circular paths wll be equal. Reason: Any two charged particles having equal kinetic energies and entering a region of unifrom magnetic feild vec(B) in a direction perpendicular to vec(B), will describe circular trajectoreis of equal radii.

Answer 1

assertion is incorrect because charge by mass ratio of proton and Alpha particles are not same their radius will not be equal and reason is correct