A 0.250-H inductor carries a time-varying current given by the expression i = (124 mA) cos[(240π/s)t] (a) Find an expression for the induced emf as a functions of time. Graph the current and induced emf as functions of time for t = 0 and t = 1/60s. (b)What is the maximum emf? What is the current when the induced emf is a maximum? (c) What is the maximum current? What is the induced emf when the current is a maximum?
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