Question

Find the inductance when the energy is given by 2 units with a current of 16A. (a) 15.6mH (b) 16.5mH (c) 16.8mH (d) 15.8mH The question was asked in semester exam. Asked question is from Magnostatic Energy in portion 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

The correct option is (a) 15.6mH To explain I would say: The energy stored in an inductor is given by E = 0.5 LI^2. To get L, put E = 2 and I = 16 and thus L = 2E/I^2 = 2 x 2/16^2 = 15.6mH.