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Question:

Is this inductor example correct?

I am in a college Circuits class and I think this example in the book is done incorrectly. If anyone can tell me different that would just as good and explain why. Here is a link to the problem and answer

Answer:

The answer is incorrect. The voltage waveform is incorrect. The voltage must remain constant during intervals in which the slope of the current is constant. The voltage should be -2.5V between 2 and 6ms. The stored energy is also incorrect. At t3ms, i 6.25ma; so the energy stored at that time should be 6.25^2 X 2H / 2 39.06 micro-Joules.

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