Five identical 15μC point charge are located at the center and corners of a square defined by -1<x,y<1, z=0. (a) Find force on the 10 μC point charge at (0,0,2) (b) Calculate electric field intensity at (0,0,2).
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Identical objects are located at the same distance from two spherical mirrors, A and B. The magnifications produced by the mirrors are mA = 4.0 and mB = 2.0. Find the ratio fA/fB of the focal lengths of the mirrors.
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