Four equal point charges are placed at the four vertices of a regular tetrahedron of…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

Four equal point charges

+q

are placed at the four vertices of a regular tetrahedron of edge length

\ell

. Which one of the following gives the total electric potential energy of the configuration? (a)

U=\dfrac{5kq^{2}}{\ell}

(b)

U=\dfrac{12kq^{2}}{\ell}

(c)

U=\dfrac{6kq^{2}}{\ell}

(d)

U=\dfrac{3kq^{2}}{\ell}