Transient analysis and behaviour of inductor and capacitor

Discussion in 'General Electronics Chat' started by skkk, May 12, 2010.

  1. skkk

    Thread Starter New Member

    Apr 5, 2010
    Any body explain me how inductor and capacitor behave in transient analysis when t=0,t>0. And why? Means how capacitor and inductor open circuit and short short circuit and when?
    Last edited: May 12, 2010
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
    What does all that shorthand mean?
  3. Jony130

    AAC Fanatic!

    Feb 17, 2009
  4. bk8190

    New Member

    May 12, 2010
    Capacitors are open circuits to DC, and short circuits to high frequencies.
    Inductors are open circuits to high frequencies, and short circuits to DC.

    The voltage across a capacitor cannot change instantly, and the current through an inductor cannot change instantly.

    A capacitor is governed by the differential equation
    I = C (dV/dt)

    An inductor is governed by the differential equation
    V = L (dI/dt)
  5. Ghar

    Active Member

    Mar 8, 2010
    In this case DC means "after a long time".
    Suddenly connecting a DC source (like a battery) is not true mathematical DC. After a "long time" it's DC, when it's entirely constant. That's when the capacitors are fully charged (open circuit, no more current) and the inductors carry the maximum current they can (short circuit, no more voltage).