14. Which following statement regarding the electric field or potential is correct?
(A) The electric field at a short distance above a single plane, with uniform surface charge density σ, has the magnitude E =σ/ε₀, where ε₀ is permeability in air.
(B) The electric field at any point between two parallel infinite conducting plates, each with uniform surface charge density σ, has the magnitude E =σ2/ε₀.
(C) The electric field at any point outside two parallel infinite conducting plates, each with uniform surface charge density σ, has the magnitude E = 0.
(D) The electric potential at any point between two parallel infinite conducting plates, each with uniform surface charge density σ, has constant value.