Two infinite slabs of thickness d meet at x=0.The slab -d

Question

Two infinite slabs of thickness d meet at x=0.The slab -d<x<0 has uniform volume charge density -ρ, while the slab 0<x<d has uniform volume charge density +ρ.Which expressions are correct?

G1 Physics · Accepted Answer

The net charge per unit area of the two slabs is zero, so the external field is zero. Using dEₓ/dx = ρ_v/ε₀, for 0<x<d and E(d)=0: Eₓ = ρ(x-d)/ε₀. For -d<x<0 and E(-d)=0: Eₓ = -ρ(x+d)/ε₀. Both are negative inside the slabs, so D is false.

Two infinite slabs of thickness d meet at x=0.The slab -d&lt;x&lt;0 has uniform volume charge density -ρ, while the slab 0&lt;x&lt;d has uniform volume charge density +ρ.Which expressions are correct?

Two infinite slabs of thickness d meet at x=0.The slab -d<x<0 has uniform volume charge density -ρ, while the slab 0<x<d has uniform volume charge density +ρ.Which expressions are correct?