Series RL circuit

Discussion in 'Homework Help' started by manaxmizery, Oct 2, 2015.

  1. manaxmizery

    Thread Starter New Member

    Nov 7, 2012
    7
    0
    upload_2015-10-3_0-47-8.png


    For this question , I have used the methods as shown in the picture below :




    And for the second question :

    upload_2015-10-3_0-57-45.png

    I have used the following working :

    upload_2015-10-3_1-5-59.png
    upload_2015-10-3_1-6-24.png


    Can anyone help me check and give me feed back on whether I have done the correct steps and assumptions ? Thanks in advance.

    Regards,
    Steve
     
  2. manaxmizery

    Thread Starter New Member

    Nov 7, 2012
    7
    0
    Here's the working to part 1a - couldn't attach it to the original post !

    20151003_005033.jpg
     
  3. shteii01

    AAC Fanatic!

    Feb 19, 2010
    3,393
    497
    t=2.5 seconds is wrong.

    Your limits of integration is from 0 to 2.5 seconds. But within those limits you have two distinct segments. First segment is where v(t)=10 volts, this segment is from 0 to 2 seconds. Second segment is where v(t)=0 volts, this segment is from 2 to 2.5 seconds.

    Since integral of zero is zero, you really only have the integral from 0 to 2 seconds plus 1 A.


    And, of course, you integral at 4 seconds is also wrong.
     
Loading...