Phase change in inductors and capacitors

Discussion in 'General Electronics Chat' started by AVPU, Jun 17, 2011.

  1. AVPU

    Thread Starter New Member

    Jun 17, 2011
    Sir, can you please make me understand, why a phase change occur while an ac runs through an inductor or capacitor.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    That is a phase shift (a phase change is a chemistry term, meaning a change in physical state like ice melting) you are trying to learn about. Our Ebook has material that talks about these phase shifts. Start reading here -
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  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    If you put too much AC into an inductor or a capacitor it will indeed exhibit a phase change as all the magic smoke floats out.

    That is a change of phase from solid to gas referred to as "sublimation."
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  4. nigelwright7557

    Senior Member

    May 10, 2008
    In a pure resitance the voltage and current are in phase.

    If you apply a voltage to a capacitor through a resistor then max ccurrent flows to start with while the voltage is almost zero. This means the current is leading the voltage. But once the capacitor is charged the voltage is max and the current is zero.
    With an inductor the opposite occurrs, the voltage leads the current.
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  5. jt6245


    Feb 18, 2011
    Phase angle appears when voltage and current are not working in the same direction.