# 11. [4 pts] Two charges, +1 nC and -4 nC, are placed on a planar grid,...

###### Question:

11. [4 pts] Two charges, +1 nC and -4 nC, are placed on a planar grid, as shown at right. What value of charge should be placed at point P so that the electric field at the origin (center of grid) points straight to the right? +1 nC (A)-10 nC (B)-8nC (C)-5 nC (D)-4 nC (E)+4 nGC -4 nC

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