Energy in an inductor

  • Thread starter sinned4789
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  • #1
sinned4789
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Homework Statement


the current through an element is i = 2t^2 - 1 Amps. if that element is a 4H inductor, what is the energy delivered to it from time t=1 to t=3.


Homework Equations


energy in an inductor is dw = Li di


The Attempt at a Solution


i = 2t^2 - 1
di = 4t dt
w = L integral[ (2t^2 - 1)(4t) dt ] from 1 to 3 seconds

i just want to confirm it with someone if i did it right or not. i felt like i did. thanks.
 

Answers and Replies

  • #2
ideasrule
Homework Helper
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yeah, that's right
 

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