Question: A coil bas 400 turns and self-inductance 3.50 mH. The current in the coil varies with time according to i = (680 mA) cos (t/0.0250s).

A coil bas 400 turns and self-inductance 3.50 mH. The current in the coil varies with time according to i = (680 mA) cos (πt/0.0250s).
(a) What is the maximum emf induced in the coil?
(b) What is the maximum average flux through each tum of the coil?
(c) At t = 0.0180 s. what is the magnitude of the induced emf?

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