physics c

A conducting sphere has a net charge of +Q . Points A and B are on opposite sides of the surface of the sphere. If a point charge +q is moved from point A to point B in a straight line through the center of the sphere, the work done to move the charge is WC . If a point charge +q is moved from point A to point B along the surface of the sphere, the work done is WS . How do Wc and Ws compare?

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