Question

Calculate the emf in a material with flux linkage of 3.5t^2 at 2 seconds. (a) 3.5 (b) -7 (c) -14 (d) 28 This question was posed to me in final exam. The question is from Maxwell Law in Time Static Fields in portion Maxwell Equations 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 (c) -14 Easiest explanation: The emf induced in a material with flux linkage is given by Vemf = -dλ/dt. On substituting λ= 3.5t^2, we get emf = -7t. At time t = 2sec, the emf will be -14 units.