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Figure 1 below depicts an electric dipole. The positive and negative charges in the dipole are arrayed along the $y$ axis symmetrically about the origin. Two field points are shown. One field point, $P_\uparrow$, lies along the dipole axis a distance $z$ above the dipole center. The other field point, $P_\downarrow$, lies along the dipole axis a distance $z$ below the dipole center.

Figure 1. “Timothy Black. Created for Albert.io. Copyright 2016. All rights reserved.”

Which of the following statements correctly describes the relations between the magnitude and direction of the electric fields due to the dipole at points $P_\uparrow$ and $P_\downarrow$?

A

The fields have the same magnitude and the same sign.

B

The fields have the same magnitude and opposite signs.

C

The fields have different magnitudes and the same sign.

D

The fields have different magnitudes and the opposite signs.

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