Sheets of Charge: a Huge (Essentially Infinite) Horizontal Nonconducting Sheet

question 4

Multiple Choice

Sheets of charge: A huge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. The upper face carries +95.0 nC/m² while the lower face carries -25.0 nC/m². What is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 0.00 N/C
• B) 3.95 × 10³ N/C
• C) 6.78 × 10³ N/C
• D) 7.91 × 10³ N/C
• E) 1.36 × 10⁴ N/C