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AP Physics C: E&M
8.3 Electric Fields
8.1 Electric Charge and Electric Force
AdvancedMCQGraphicalMathematicalConceptual23.9k
A single horizontal axis line extends from left to right with an arrowhead at the right end labeled x. Two tick marks are positioned along the line: one at the center labeled 0, and one to the right labeled d. Directly above the tick mark at 0 sits a small filled circle labeled +Q. Directly above the tick mark at d sits an identical small filled circle labeled -4Q. A dashed vertical reference line passes through the tick mark at 0, and a second dashed vertical reference line passes through the tick mark at d. No other labels, lines, text, or axes appear.
Charge arrangement on the x-axis.
A point charge +Q is fixed at the origin x = 0, and a point charge -4Q is fixed at x = d on the x-axis. Let E_x represent the x-component of the electric field along the x-axis, where the positive direction points to the right. Which of the following graphs best represents E_x as a function of position x?

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