Help me solve the RLC differential Equation~!

Discussion in 'Homework Help' started by kiki998, Mar 18, 2009.

  1. kiki998

    Thread Starter New Member

    Mar 18, 2009
    3
    0
    Pls help me solve it the circuit is there....
     
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  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Assign currents in the circuit and then use KCL to relate the voltages. You have to end up with a second order differential equation.
     
  3. kiki998

    Thread Starter New Member

    Mar 18, 2009
    3
    0
    means how i not so clear about it :(
     
  4. kiki998

    Thread Starter New Member

    Mar 18, 2009
    3
    0
    can help me find out the differential equation?
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Just use a method of circuit analysis but instead of using the frequency domain (impedances) to analyze the circuit represent the voltage or the current for an inductor or capacitor with their derivative function.


    v=Ldi/dt

    i=CdV/dt
     
  6. hitmen

    Active Member

    Sep 21, 2008
    159
    0
    After looking at your problem I realise that I dunno how to do it too

    Vi + V(R1) + 1/C∫ i dt = 0

    (1/C)∫ i dt + L (di/dt) + v(R2) = 0

    Vi + V(R2) + L di/dt + V(R2) = 0

    I remember it being somewhere in last sem notes but I cant seem to recall how to do it
     
  7. GirishC

    Active Member

    Jan 23, 2009
    58
    0
    Now apply Lapalce transform..do arithmatic...solve by PD and take inverse Laplace...vola...you get the answer
     
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