Question

Calculate the emf when the flux is given by 3sin t + 5cos t (a) 3cos t – 5sin t (b) -3cos t + 5sin t (c) -3sin t – 5cos t (d) 3cos t + 5sin t The question was posed to me during an internship interview. The doubt is from Faraday Law, EMF and Lenz Law 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 answer is (b) -3cos t + 5sin t The explanation: The electromotive force is given by Vemf = -dλ/dt. Thus Vemf = -dλ/dt = -(3cos t – 5sin t) = -3cos t + 5sin t.