A charged particle q is shot towards another charged particle Q which is fixed, with a speed V. It approaches Q upto a closest distance r and then returns. If q were given a speed of 2V, the closest distance of approach would be

Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire, then in equilibrium condition, the ratio of the magnitude of the electric fields at the surface of spheres A and B is