capacitors with D.C currnet

Discussion in 'Homework Help' started by Abu Aljubz, Jan 16, 2014.

  1. Abu Aljubz

    Thread Starter New Member

    Jan 16, 2014
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    there was a question that i couldn't answer in my book. the question said:

    A student places a capacitor across the terminals of a D.C power supply. ( the voltage is not constant) Suggest how this produces a constant voltage.
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    I have moved this to Homework Help.
     
    Last edited: Jan 16, 2014
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
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    by storing energy. think of it like a flywheel on a motor.
     
  4. Abu Aljubz

    Thread Starter New Member

    Jan 16, 2014
    2
    0
    how? can you explain more?
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
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    a capacitor stores energy, the greater the value in farads, the more it stores. like a battery, except not as great a storeage capacity. the storeage is generaly thought of as a stress in the molecular structure of the insulation seperating the plates. when currrent is pulled from the power supply, and the ourput voltage tries to drop, the cap makes up for some of the power. I have used large capacitors across power supplies before, when starting surge current is to great for the supply to handle.
     
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