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Charges Q_1 = -q and Q_2 = +4q are placed as shown. Of the five positions indica

ID: 1597216 • Letter: C

Question

Charges Q_1 = -q and Q_2 = +4q are placed as shown. Of the five positions indicated by the numbered dots, the cine at which the electric field E is zero is A) 3. B) 2. C) 1. D) 4. E) 5. F) None of the above The point P is on the axis of a ring of charge, and all vectors shown lie in the yz plane. The negatively charged ring lies in the xz plane. The vector that correctly represents the direction of the electric field at this point is A) 2 B) 3 C) 4 D) 1 E) 5 F) None of the above Two infinite non-conducting sheets of charge are parallel lo each other, with sheet A in the x = -3.0 m plane and sheet B in the x = +3.0 m plane. Find the electric field in the region x +3.0 m, and between the sheets for the following situations: (a) When each sheet has a uniform surface charge density equal to +6.0 (b) When sheet A has a uniform surface charge density equal to +6.0 and sheet B charge density equal to -6.0. (c) Sketch the electric field-line pattern for each

Explanation / Answer

Ans 7. (F) None of the above is the correct answer.

Ans8. (C) The direction of the electric field at the point P is toward the number 4.