A circular ring of radius R with uniform positive charge density λ per unit leng this located in the yz plane with its centre at the origin O. A particle of mass m and positive charge q is projected from the point P(R √3 , O, O) on the positive x-axis directly towards O, with an initial kinetic energy
(A) The particle crosses O and goes to infinity.
(B) The particle returns to P
(C) The particle will just reach O.
(D) The particle crosses O and goes to –R √3.
