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Duration of Charging a capacitor

  1. Apr 2, 2013 #1
    How we calculate the duration of depositing a specific amount of charge via a battery on a pure Capacitor when resistance is not present..and we cant use the formulas of RC combinatio?
  2. jcsd
  3. Apr 2, 2013 #2


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    i'm not certain, but I think you'd need a quantum treatment, since that is essentially a superconductor.
  4. Apr 2, 2013 #3


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    This is an essentially classical problem. Resistance is never zero - even in a real circuit with superconductors in it. With low resistance, RC time constants can be very low but all circuits with a physical size will radiate EM power when the current is varying. This radiated power shows up as a resistance somewhere in your circuit so there is a finite value for the time constant.
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