Physics

Problem

Three identical point charges of

+2.0\,\mu\text{C}

are fixed at the vertices of an equilateral triangle of side

0.40\,\text{m}

. What amount of work must be done to bring a fourth charge of

+2.0\,\mu\text{C}

from very far away to the center of the triangle? a)

-4.7\times10^{-1}\,\text{J}

1.6\times10^{-1}\,\text{J}

4.7\times10^{-1}\,\text{J}

2.7\times10^{-1}\,\text{J}