Question Detail

PHY 102 Electrostatics: Electric Charge and Coulomb's Law Objective Question

Question

What is the electric field formula for an infinite plane of charge with surface charge density σ?
Options
A E = σ/ε₀
B E = σ/2ε₀
Correct Answer
C E = kQ/r
D E = 4πkσ
Correct Answer

Option B is the correct answer.

Detailed Explanation

The electric field of an infinite nonconducting plane of charge is uniform and has a magnitude of σ divided by two times the permittivity of free space.

Hint

The field is half of that found between two parallel plates.

Question Info