1.

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 tThe 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

Answer»

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.



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