Sheets of Charge: a Very Large Sheet of a Conductor

Multiple Choice

Sheets of charge: A very large sheet of a conductor carries a uniform charge density of 4.00 pC/mm² on its surfaces. What is the electric field strength 3.00 mm outside the surface of the conductor? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

A) 4.52 × 10⁵ N/C
B) 2.26 × 10⁵ N/C
C) 9.04 × 10⁵ N/C
D) 0.452 N/C
E) 0.226 N/C