The Coulomb constant k has a value of 8.99 × 10⁹ N·m²/C². The permittivity of vacuum ε_o has the units A) N·m²/C². B) N·m/C. C) C/(N·m). D) C²/(N·m²). E) none of the choices are correct.

Question

Quizplus · Accepted Answer

The permittivity of vacuum (ε₀) is the reciprocal of the product of the Coulomb constant (k) and 4π, which gives it units of C²/(N·m²), matching choice D.

The Coulomb Constant K Has a Value of 8