Question

The effective skin resistance of a material with conductivity 120 and skin depth of 2μm is (a) 4.16 kilo ohm (b) 4.16 mega ohm (c) 41.6 kilo ohm (d) 41.6 mega ohm This question was posed to me in an online interview. I want to ask this question from Skin Effect topic in section Transmission Lines 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

Correct answer is (a) 4.16 kilo ohm The best explanation: The effective skin resistance is given by Rs = 1/δσ, where δ is the skin depth and σ is the conductivity. For the given data, δ = 2 x 10^-6 and σ = 120, we get Rs = 1/(120x2x10^-6) = 4.16 kilo ohm.