Question

Help With Electric Field

Answer 1

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). (Note: even a non conducting sheet can
have only surface charges, they do not always have to be uniformly charged)

Answer 2

Have you tried modelling as 2 infinite sheets and superimposing?

From Hyperphysics....

Answer 3

A symmetrical Gaussian surface inside your sheet should tell you that \(E_{in} = E_{out}\), ie E = const, but not what E actually is.

Answer 4

What is the surface sheet charge density Q/L^2

Answer 5

for top

\(\sigma = \) +95.0 nC/m2


for bottom

\(\sigma = \) -25.0 nC/m2

Answer 6

Thanks