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The expression of Coulomb's law in the form F = (1/4πε₀)·|q₁q₂|/r² involves which physical constant ε₀?
AFaraday's constant
BPermittivity of free space, value ≈ 8.85 × 10⁻¹² C²/N·m²
CBoltzmann constant
DMagnetic permeability of free space
Answer & Solution
Correct answer: B. Permittivity of free space, value ≈ 8.85 × 10⁻¹² C²/N·m²
ε₀ is the permittivity of free space, ≈ 8.854 × 10⁻¹² C² N⁻¹ m⁻². The other constants belong to chemistry (Faraday), thermodynamics (Boltzmann), and magnetism (μ₀) respectively.
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