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(1) There are two charges: q1 = +0.00010C and q2 = -0.00010C, both located on the x axis, at (-0.10m, 0.00m) (notation: x position, y position) and (+0.10m, 0.00m) respectively. What is the direction of electric field generated these two charges on the y axis at (0.00m, 0.05m)? Explain.
(2) what is the net electric field at (0.00m, 0.05m) of the above problem?
(3) For a uniformly charged spherical shell with a net charge Q ( positive charge), and radius R, what is the net electric field Eo in the center of the sphere? What is the net electric field E2 ( direction and amplitude) at r=2R from the center?
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