(adsbygoogle = window.adsbygoogle || []).push({}); The current in an inductor when energy is stored. Please help!!!

1. The problem statement, all variables and given/known data

What's the current in a 15mH inductor when the stored energy is 42μJ

2. Relevant equations

E = 1/2 L i^2

3. The attempt at a solution

.000042J = (.5)(.015H)(i^2)

.000042J = (.0075)(i^2)

.0056 = i^2

√ (.0056) = i

.0748331 = i

I need to put the answer in with only two sig figs so i put in .07 but it was wrong :grumpy:

What am I doing wrong?

**Physics Forums - The Fusion of Science and Community**

# The current in an inductor when energy is stored. Please help

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: The current in an inductor when energy is stored. Please help

Loading...

**Physics Forums - The Fusion of Science and Community**