Solving RC Circuit Questions: How to Find Charge/Current

  • Thread starter Thread starter joedirt
  • Start date Start date
  • Tags Tags
    Circuits
Click For Summary

Homework Help Overview

The discussion revolves around a series RC circuit involving a capacitor and a resistor connected to a battery. The original poster seeks guidance on the equations necessary to determine the charge on the capacitor and the current in the resistor after a specified time.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the equations relevant to RC circuits and the application of Kirchhoff's laws. The original poster expresses uncertainty about the equations needed, while others inquire about the application of Kirchhoff's loop rule in this context.

Discussion Status

The conversation is ongoing, with participants exploring foundational concepts and equations related to RC circuits. Guidance has been offered regarding the use of Kirchhoff's laws, but no consensus or resolution has been reached yet.

Contextual Notes

The original poster indicates a lack of familiarity with the necessary equations, which may influence the direction of the discussion.

joedirt
Messages
5
Reaction score
0
Circuits question!?

A series RC circuit consists of a 550-µF capacitor (initially uncharged) and a 12-kOhm resistor. The combination is connected across a 12-V battery; 3.0 s later, what is

(a) the charge on the capacitor,

(b) the current in the resistor?


I really just want to know what equations I need to use.. I'm sure I can work it out knowing the right way to do it.
 
Physics news on Phys.org


What equations do you know that concern RC circuits, or circuits in general?
 


I don't know any that's way I'm asking for the equation/s. I know a little about the Kirchhoff's current laws.
 


That's fine, you can use Kirchoff's laws to solve the problem. How would you apply Kirchoff's loop rule to this circuit?
 

Similar threads

When Is the Potential Across a Capacitor Equal to That Across a Resistor?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Grounding a circuit through a capacitor/parallel RC circuit
  • · Replies 7 ·
Replies
7
Views
3K
Calculating Current in a Series RC Circuit
  • · Replies 4 ·
Replies
4
Views
3K
Determining Current Direction in a Charging RC Circuit
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Can current flow in an open circuit?
  • · Replies 4 ·
Replies
4
Views
3K
Correct statement about series RC circuit
  • · Replies 4 ·
Replies
4
Views
3K
Voltage and effective resistance of an infinite lattice of resistors
  • · Replies 2 ·
Replies
2
Views
2K
How Does Radioactive Decay Affect Current in a Spherical Capacitor Circuit?
  • · Replies 5 ·
Replies
5
Views
3K
Ohm's Law - Finding Source Voltage
  • · Replies 3 ·
Replies
3
Views
2K
Where Is Power Dissipated in an RC Circuit?
  • · Replies 11 ·
Replies
11
Views
15K