Calculating the current in an inductor (AC)

[scizzzro]

Homework Statement:

A 100mH inductor is connected directly to a voltage source whose voltage is given by
v = 0V for t<0s
and
v = 5(1-e^(-t)) V for T =>0s

The inductor current at t=0 s is zero. Calculate the inductor current at t=0.4 s

Relevant Equations:

v = 5(1-e^(-t))

I integrated the second equation given in the form (integral)di= 1/L * (integral) V *dt and I got an answer of 3.52 for the current at 0.4 seconds, anyone can let me know if this is correct?

 

[TSny]

I get the same result. Should you include units with your answer?

 

[scizzzro]

I get the same result. Should you include units with your answer?

Thanks, it says for just a number for inductor current without units just for this question

 

[DaveE]

Thanks, it says for just a number for inductor current without units just for this question

Yes, but the information you used to get the solution did have units (V, mH, sec), so when you calculated the answer, it also gets units. Maybe your grader doesn't care, but they are there, and should be included IMO. This is a really good habit to develop in any engineering field.