- #1
Willa
- 23
- 0
Hello folks, just having a few problems getting my head round LRC circuits and so have gone back to basics, first starting with Capacitors and Inductors discharging through resistors. At this stage I ask of you kind sirs two things: 1. Confirm that my understanding of the capacitor discharge (below) is correct. 2. Give a similar style explanation for Inductor discharge (I'm struggling with what causes the current to start to decrease in that one).
Capacitor Discharge: Charge starts to flow from one plate to the other through the resistor, as it does, the pd across the capacitor drops due to V = Q/C. By kirchhoffs 2nd law, going round the circuit the pd across the resistor is equal and opposite to the pd across the capacitor, so the pd across the resistor drops. By I=V/R, the current drops, this means the rate at which charge is transferred between the two plates of the capacitor decreases...resulting in an exponential decay of charge on capacitor.
Is that all correct?
And so if someone can do a similar (qualitative) explanation of the inductor discharge that would be brill!
Cheers
Capacitor Discharge: Charge starts to flow from one plate to the other through the resistor, as it does, the pd across the capacitor drops due to V = Q/C. By kirchhoffs 2nd law, going round the circuit the pd across the resistor is equal and opposite to the pd across the capacitor, so the pd across the resistor drops. By I=V/R, the current drops, this means the rate at which charge is transferred between the two plates of the capacitor decreases...resulting in an exponential decay of charge on capacitor.
Is that all correct?
And so if someone can do a similar (qualitative) explanation of the inductor discharge that would be brill!
Cheers