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1) Two point charges (-5q) and (+4q) are placed at (0,3a) and (3a,0) respectively, as shown in
the figure.
a) Find the electric field vector É at the point P(4a,0).
b) Find the electrostatic force exerted on a point charge (+Q) placed at point P.
YA
-5q
За
За
+4q
2) A uniformly charged thin nonconducting sheet faces a conducting slab as shown in the figure.

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