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# (a) If an inductor carrying a 1.70-A current stores an energy of 0.300 mJ, what is its inductance? (b) How much energy does the same inductor store if it carries a 3.00-A current?

## a. 208 \mu Hb. 0.94 \mathrm{mJ}

### Discussion

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##### Christina K.

Rutgers, The State University of New Jersey

##### Marshall S.

University of Washington

##### Aspen F.

University of Sheffield

### Video Transcript

Okay, So energy is given by 1/2 times induct inst times. Kurt Squared. Therefore induct Ince's equal to two times energy over I square. Um, energy. Really have where given is point through, Millie. Jewel. Some 0.0.3 times. 10 to the negative. Three. Jos current is two amps. So that's two are I should say, 1.7 amps, 1.7 amps squared. This gives you an inductive nce off 2.8 times 10 to the negative for Henry or about point to Millie. Henry, that was part of it. And for part B. Um, same equation. This time we're finding energy. So it's 1/2 ally squared. Uh, l we just found to be 2.8 times 10 to the negative for Henry. Um, And I this time is three amps square that you get, uh, 0.94 No, Jules. And that's it.

New Mexico State University
##### Christina K.

Rutgers, The State University of New Jersey

##### Marshall S.

University of Washington

##### Aspen F.

University of Sheffield