Two large non-conducting plates of surface area A = 0.25 m² carry equal but opposite charges Q = 75 μC. What is the energy density of the electric field between the two plates?

Question

Quizplus · Accepted Answer

The energy density (u) of the electric field between two plates is given by u = (1/2)ε₀E², where E is the electric field and ε₀ is the permittivity of free space (8.85 × 10⁻¹² C²/N·m²). The electric field E between the plates is given by E = σ/ε₀, where σ = Q/A. Substituting the values, we find the energy density to be approximately 1.7 × 10⁷ J/m³.

Two Large Non-Conducting Plates of Surface Area a = 0