home > q&a board > electrical engineering > topic: rl circuit, need answer plz!!

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posted by  Felon on 10/5/2008 9:15:13 PM  |  status: Live  

RL circuit, need answer plz!!

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Question Details:

Find iL at t equal to
a)-.5s
b).5s
c)1.5s
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posted by shann(EE-SME) on 10/6/2008 3:39:07 AM  |  status: Live
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Felon's comment:
"thanks!"
Response Details:
For ,  so it is replaced with open circuit and initial inductor current
From the given circuit by using KCL we can write as below
......... (1)
We can also write
Now the equation (1) becomes
By taking Laplace transform we can get




By taking inverse Laplace transform we can write

.................. (2)
By substituting t values in equation (2) you can get the inductor current values
 
 
I hope this helps you.....................
 
 
 
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