Question

Find the conductivity of a material with conduction current density 100 units and electric field of 4 units. (a) 25 (b) 400 (c) 0.04 (d) 1600 The question was posed to me during an interview for a job. The doubt is from Displacement and Conduction Current in section Electric Fields in Material Space of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

The correct option is (a) 25 For explanation I would say: The conduction current density is given by, Jc = σE. To get conductivity, σ = J/E = 100/4 = 25 units.