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## Homework Statement

I have this question. If I can get that formula, I will be able to solve it! :)

Here is the question:

The current in a 51 mH inductor changes with time as I = b t

^{2}− a t. With a = 20 A/s and b = 7 A/s

^{2}, find the magnitude of the induced emf, |E|, at t = 1.2 s. Answer in units of V.

E = Emf

## Homework Equations

This is what I need to know! :)

## The Attempt at a Solution

I am guessing that I will have to differentiate the equation. Please help! :)

Thanks