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Two charges are placed equidistant from the origin along the x-axis. The electric potential (voltage) is measured for points along the $x$-axis and shown with a graph.

Which conclusions drawn from the diagram are true?

Select TWO answers.

A

The electric field is never zero because the potential never crosses the x-axis.

B

The electric field is zero at the origin because over a small displacement at the origin, the change in potential is zero.

C

The charges exert a force of attraction on each other because they have opposite sign.

D

The charges exert a force of repulsion on each other because they have the same sign.

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