Question

Find the magnetic flux density when a point from a finite current length element of current 0.5A and radius 100nm. (a) 0 (b) 0.5 (c) 1 (d) 2 This question was posed to me by my college professor while I was bunking the class. Question is from Biot Savart Law in chapter Magnetostics 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 option is (c) 1 The explanation is: The magnetic flux density is B = μH, where H is given by I/2πr. Put μ = 4π x 10^-7, I = 0.5 and r = 10^-7, we get B = 4π x 10^-7 x 0.5/2π x 10^-7 = 1 unit.