S1 -5Q S4 S3 °+2Q •+Q S2 Four closed surfaces from S, to S4 are shown with their charges in the figure. Determine the electric flux through each closed surface. 20 а) Ф, 02 = 0, P3 ,Pg = 0 b) ¤1 - 2, P3 = 0, 04 2 3. 20 30 = P4 = 0 30 с) Ф, 2Q 20 02 P4 = 0 = - d) D, = - e) P1 3Q = 0 = - 3 4
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