Physics

Problem

Which of the following is the correct SI unit of the electrostatic constant

k

that appears in Coulomb’s law? a)

\text{N}\,\text{m}^{-2}\,\text{C}^{-2}

\text{N}\,\text{m}^{2}\,\text{C}^{-2}

\text{N}\,\text{m}^{2}\,\text{C}^{2}

\text{N}\,\text{m}\,\text{C}^{-2}