APFIVE Net Force in a Tetrahedral Charge Configuration
Four point charges of equal magnitude q are positioned at the vertices of a regular tetrahedron with edge length a. If three of the charges are positive and one is negative, what is the magnitude of the net electric force exerted on the negative charge?
A
$$6kq^2/a^2$$
B
$$3kq^2/a^2$$
C
$$\sqrt{6}kq^2/a^2$$
D
$$3\sqrt{6}kq^2/a^2$$
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