Question

What is the value and unit of Coulomb's constant \[\frac{1}{4\pi\varepsilon_0}\]?

Options

• Approximately 9 × 10⁻⁹ Nm²C⁻²

• Approximately 1 Nm²C⁻²

• Approximately 8.85 × 10⁻¹² C²N⁻¹m⁻²

• Approximately 9 × 10⁹ Nm²C⁻²

Answer 1

Coulomb's constant, represented as \[\frac{1}{4\pi\varepsilon_0}\], has a value of approximately 9 × 10⁹ Nm²C⁻². This constant appears in all electrostatic calculations and relates the electric field strength to the source charges and distances.