Duration of Charging a capacitor

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    Capacitor Charging
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SUMMARY

The discussion centers on calculating the duration of charge deposition in a pure capacitor without resistance, emphasizing that resistance is never truly zero in practical circuits. Participants highlight that even in superconductors, there is a finite resistance due to electromagnetic radiation when current varies. The classical nature of this problem is underscored, indicating that traditional RC time constant formulas are not applicable in this scenario.

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  • Knowledge of superconductors and their properties
  • Basic concepts of electromagnetic radiation in circuits
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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 can't use the formulas of RC combinatio?
 
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i'm not certain, but I think you'd need a quantum treatment, since that is essentially a superconductor.
 
moatasim23 said:
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 can't use the formulas of RC combinatio?

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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