53. (a) The electric potential is the sum of the contributions of the individual spheres. Letq1be the chargeon one,q2be the charge on the other, anddbe their separation. The point halfway between themis the same distanced/2(=1.0 m) from the center of each sphere, so the potential at the halfwaypoint isV=q1+q24πε0d/2=(8.99×109N·m2/C2)(1.0×10−8C−3.0×10−8C)1.0m=−1.80×102V.(b) The distance from the center of one sphere to the surface of the other isd−R,whereRis the radiusof either sphere. The potential of either one of the spheres is due to the charge on that sphere and
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.