A positive charge Q = 1.1 x 10–9 C is located on the x-axis ... ...

  A positive charge Q = 1.1 x 10–9 C is located on the x-axis at x = –10–3 m, and a negative charge of the same magnitude is located at the origin. What is the magnitude and direction of the electric field at the point on the x-axis at x = 10–3 m? (Right means the positive x-direction.)
(A) 7.5 x 106 N/C, to the left.
(B) ...
(C) ...
(D) ...
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*This question is included in 14. Electrodynamics