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

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

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}

(b)

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

(c)

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

(d)

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