The current in a 470 mh inductor decays over time according, Ask an Expert

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The current in a 4.70 mH inductor decays over time according to the following function, where t is in seconds.

\(I(t)=(0.943 A)e^{-(396s^{-1})t}\)

(a) What is the induced emf across the inductor at t= 5.00 ms?

(b) How long does it take the emf to drop below 1.25 mV?

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