A point charge +2Q is fixed at x = −d

PHYSICS · Single correct · AP · Physics C: Electricity and Magnetism · Electric Charges Fields and Gauss's Law · Electric Charges Fields and Gauss's Law

Problem

A point charge +2Q is fixed at x = −d, and a point charge −Q is fixed at x = +d on the x–axis. Consider three observation points: A at the origin (0, 0), B at (0, 2d), and C at (2d, 0). Rank the magnitudes of the net electric field at these points from greatest to least. (a) C > A > B (b) B > A > C (c) A > C > B (d) A > B > C

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