APFIVE Dipole Electric Potential on Axis
A dipole consists of charges +q and -q separated by distance d. At what location along the dipole axis (measured from the center of the dipole) is the electric potential equal to one-half its maximum value (not at infinity)?
A
$$r = \pm 2d$$
B
$$r = \pm \frac{d}{2}$$
C
$$r = \pm \frac{d\sqrt{3}}{2}$$
D
$$r = \pm d$$
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