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Problem #5 : a) Two positive charges, Qa and Qb are placed on opposite sides of...

Problem #5 : a) Two positive charges, Qa and Qb are placed on opposite sides of a grounded sphere of radius R at distances of 3R and 6R, respectively, from the sphere center. Show that Qb is repelled from the sphere if Qb < QA * (72275/87723)

b) A infinite wire with line charge density λ is placed a distance d above a grounded conducting plane. Assume that the wire is parallel to the x-axis and is located at in the y=0 plane. Find i) the potential above the conducting plane and ii) the charge density on the conducting plane.

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