Question

Two conducting spheres, X and Y have the same positive charge +Q, but different radii (r_x > r_y)as shown above. The spheres are separated so that the distance between them is large compared with either radius. If a wire is connected between them, in which direction will electrons be directed in the wire?

(A) From X to Y

(B) From Y to X

(C) There will be no flow of charge in the wire.

(D) It cannot be determined without knowing the magnitude of Q.

(E) It cannot be determined without knowing whether the spheres are solid or hollow.

Answer 1

The correct option is: (A) From X to Y

Explanation:

V = kQ/r so the smaller sphere (Y) is at the higher potential. Negative charge flows from low to high potential so the charge will flow from X to Y.