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Help me

  1. Apr 22, 2010 #1
    1. For the circuit of Figure 1, VT = 100 V, R = 5000 Ω and C = 400 μF; switch S is closed at t = 0.
    a) Determine the instantaneous power absorbed by the capacitance.
    b) Obtain an expression for the instantaneous power dissipated in the resistance.
    c) Determine the voltage across the capacitor at time t = 1.39 s.



    A 75-Ω resistance is connected in parallel with a 10-μF capacitance. Determine an equivalent series RC circuit such that the two circuits have the same impedance at an angular frequency of 1000 rad/s.
    If a voltage source is connected to the parallel RC circuit as shown in Figure 2, determine the maximum energy absorbed by the capacitor.




    Figure 2
    Explain the graph for energy absorbed and released from a capacitor in the circuit in Figure 2.


    q3: Replace the network of Figure 3 to the left of terminals ab by its Thevenin’s equivalent



    q4:
    For the circuit given in Figure 4, for t > 0, determine the inductor current〖 i〗_L (t).



    the figure in the attachments
     
    Last edited: Apr 22, 2010
  2. jcsd
  3. Apr 22, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi Nasoomah! Welcome to PF! :smile:
    erm :redface:what attachments? :confused:
     
  4. May 2, 2010 #3
    [QUOTE=Nasoomah;2683904]1. For the circuit of Figure 1, VT = 100 V, R = 5000 Ω and C = 400 μF; switch S is closed at t = 0.
    a) Determine the instantaneous power absorbed by the capacitance.
    b) Obtain an expression for the instantaneous power dissipated in the resistance.
    c) Determine the voltage across the capacitor at time t = 1.39 s.



    A 75-Ω resistance is connected in parallel with a 10-μF capacitance. Determine an equivalent series RC circuit such that the two circuits have the same impedance at an angular frequency of 1000 rad/s.
    If a voltage source is connected to the parallel RC circuit as shown in Figure 2, determine the maximum energy absorbed by the capacitor.




    Figure 2
    Explain the graph for energy absorbed and released from a capacitor in the circuit in Figure 2.


    q3: Replace the network of Figure 3 to the left of terminals ab by its Thevenin’s equivalent



    q4:
    For the circuit given in Figure 4, for t > 0, determine the inductor current〖 i〗_L (t).



    the figure in the attachments[/QUOTE]
     
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