RLC Circuit qualitative explanation any1?

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Discussion Overview

The discussion centers around the qualitative aspects of RLC circuits, specifically seeking a physical understanding of the behavior of inductors, capacitors, and resistors in an AC context. Participants express a desire for explanations that go beyond vector diagrams, focusing instead on the physical meanings of voltage drops across each component, resonance, and the Q factor.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant requests a qualitative explanation of RLC circuits, emphasizing the need for physical interpretations of voltage drops in inductors, capacitors, and resistors.
  • Another participant suggests starting with the equations that relate voltage and current for each component, indicating that understanding these relationships is crucial for grasping the circuit's behavior.
  • Equations provided include V=IR for resistors, E=Ldi/dt for inductors, and V=Ed for capacitors, though a later reply indicates that these equations may not be entirely accurate in their context.
  • A later response corrects the equations, specifying the voltage relationships for each component in terms of time-dependent functions, but does not resolve the initial request for qualitative understanding.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the qualitative explanations sought. There is a mix of requests for physical interpretations and technical equations, indicating that the discussion remains unresolved regarding the qualitative understanding of RLC circuits.

Contextual Notes

The discussion highlights a reliance on mathematical relationships without fully addressing the qualitative aspects requested by the initial poster. There is also a noted expiration of a referenced link, which may limit the context for some participants.

sudar_dhoni
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can some one explain me the qualitative aspects of RLC circuit
i am satisfied with the vector diagrams i want the physical meaning behind
say for instance in ac with inductor when current varies induced electric field is set up which opposes the current so there is a voltage drop
similarly in capacitor it stores charges and they repel the incoming current and also for resistor
like this i want a physical explanation of RLC series circuit what happens there and also about resonance and q factor

can u explain in terms of voltage drops in inductor capacitor and resistor
see the source supplies energy to current or charges,these charges then somehow or the other they have to return to lower energy state so they drop their energy (energy is same as voltage -enegy possesed by unit charge) so they drop their voltage.All i have said till now is in
http://www.physicsclassroom.com/Clas...uits/u9l1b.cfm
my doubt is that how does this happen in RLC circuit
please don't explain in terms of vector diagrams as it is not convincing
i want the physical meaning behind
 

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sudar_dhoni said:
can some one explain me the qualitative aspects of RLC circuit
i am satisfied with the vector diagrams i want the physical meaning behind
say for instance in ac with inductor when current varies induced electric field is set up which opposes the current so there is a voltage drop
similarly in capacitor it stores charges and they repel the incoming current and also for resistor
like this i want a physical explanation of RLC series circuit what happens there and also about resonance and q factor

can u explain in terms of voltage drops in inductor capacitor and resistor
see the source supplies energy to current or charges,these charges then somehow or the other they have to return to lower energy state so they drop their energy (energy is same as voltage -enegy possesed by unit charge) so they drop their voltage.All i have said till now is in
http://www.physicsclassroom.com/Clas...uits/u9l1b.cfm
my doubt is that how does this happen in RLC circuit
please don't explain in terms of vector diagrams as it is not convincing
i want the physical meaning behind

(The physicsclassroom link appears to have expired)

Are you familiar with the equations that relate voltage and current for the Resistor, the Inductor, and the Capacitor? That's the best place to start, in understanding how each component works with respect to how the voltage across it and the current through it are related.
 
Last edited by a moderator:
berkeman said:
(The physicsclassroom link appears to have expired)

Are you familiar with the equations that relate voltage and current for the Resistor, the Inductor, and the Capacitor? That's the best place to start, in understanding how each component works with respect to how the voltage across it and the current through it are related.

V=IR
E=Ldi/dt
V=Ed
 
sudar_dhoni said:
V=IR
E=Ldi/dt
V=Ed

Close, but not quite right.

Resistor [tex]V(t) = I(t) R[/tex]

Inductor [tex]V(t) = L \frac{dI(t)}{dt}[/tex]

Capacitor [tex]I(t) = C \frac{dV(t)}{dt}[/tex]
 

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