Question

Find the flux density at the boundary when the charge density is given by 24 units.

(a) 12

(b) 24

(c) 48

(d) 96

This question was addressed to me by my college professor while I was bunking the class.

The origin of the question is Boundary Conditions in section Electric Fields in Material Space of Electromagnetic Theory

Answer 1

Correct choice is (b) 24

To explain: At the boundary of a conductor- free space interface, the flux density is equal to the charge density. Thus D = ρv = 24 units.