D2.2. A charge of -0.3 µC is located at A(25,-30, 15) in (cm), and a second charge of 0.5 µC is at B(-10,8, 12) cm. Find E at: (a) the origin; (b) P(15,20, 50) cm. Ans. 92.3ax - 77.6a, - 94.2a, kV/m; 11.9a, - 0.519a, + 12.4a, kV/m
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