A little different RC circuit problem Help

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SUMMARY

The discussion focuses on solving an RC circuit problem involving the calculation of time constants and current behavior when a capacitor is charged and discharged. The time constant, denoted as τ (tau), is determined using the formula τ = RC, where R is the equivalent resistance seen by the capacitor. The participants clarify that the effective resistance is found by combining resistors R1 and R2 in parallel when the capacitor is discharging. The conversation emphasizes the importance of understanding series and parallel relationships in circuits to accurately compute the time constants for both charging and discharging scenarios.

PREREQUISITES
  • Understanding of RC circuit fundamentals
  • Knowledge of series and parallel resistor combinations
  • Familiarity with time constant calculations in electrical circuits
  • Basic concepts of capacitor behavior during charging and discharging
NEXT STEPS
  • Study Thevenin's and Norton's theorems for circuit simplification
  • Learn about the exponential charging and discharging equations for capacitors
  • Explore practical applications of RC circuits in electronics
  • Investigate circuit simulation tools like LTspice for visualizing circuit behavior
USEFUL FOR

Students in physics or electrical engineering courses, particularly those studying circuit analysis and RC circuits, as well as educators looking for practical examples of capacitor behavior in circuits.

  • #31
...so what are the initial and final values for the current through the capacitor?
 
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  • #32
ah OK, interesting. So with that said now, we've got 2 time constants, and also 2 circuits? One for discharging and one for charging. Or in fact we have 4 circuits, 2 when charging (capacitor empty/full) and 2 when discharging (capacitor full/empty).
 
  • #33
gneill said:
...so what are the initial and final values for the current through the capacitor?

I'm not 100% sure how to answer this.
 
  • #34
Unfortunately I have to sign off for the evening, I will look forward to continuing this tomorrow hopefully. I am almost there :) Perhaps with a fresh mind and a bit of scrap paper I can finish this off and report the findings to you tomorrow.

Thanks again for all the help. I have been trying to find some assistance with this for weeks and within minutes of posting here I got a detailed answer and a great tutor! :)

Thanks again, truly appreciate all your help.

All the best.
 

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