Question: the current in a 2 0 mH inductor changes with time as i = 2 . 0 0 t ^ 2 - 5 . 0

the current in a 20mH inductor changes with time as i =2.00t^2-5.00t, where i is in amperes and t is in seconds. Find the magnitude of the induced emf at t =1.00s, find the magnitude of the induced emf at t =4.00s, at what time is the emf zero>

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