How Does Switching Impact Current Flow in an RL Circuit?

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    Circuit Rl circuit
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Homework Help Overview

The discussion revolves around an RL circuit involving a switch, resistors, and an inductor. The original poster presents a scenario where the switch has been open for a long time and then closed, prompting questions about the current through the resistors immediately after the switch is closed and after it has been closed for a long time. There is also a subsequent question regarding the current through one of the resistors immediately after the switch is opened.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to determine the current through R1 and R2 at different time intervals after closing and opening the switch. Some participants inquire about the original poster's understanding and previous attempts to solve the problem.

Discussion Status

The discussion has seen some initial engagement, with the original poster indicating they figured out part of the problem. However, there remains an open question regarding the current through R11 after the switch is opened, suggesting ongoing exploration of the circuit behavior.

Contextual Notes

The original poster references specific values for voltage, resistance, and inductance, which may influence the analysis. There is a mention of a misunderstanding regarding the current being zero immediately after the switch is opened, indicating a need for clarification on circuit behavior in transient states.

Havoc0040
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The switch in the figure is open for a very long time and then closed at t = 0. What is the current through R1 immediately after the switch is closed? ( Use V = 3.5 V, R1 = 848 , R2 = 548 , L = 7.2 mH )
After the switch has been closed for a long time what is the current through R1?
After the switch has been closed for a long time what is the current through R2?
 
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Hi Havoc0040. Welcome to Physics Forums.

What is your question about this problem? What have you already tried?
 
sorry i was able to figure this one out
 
gneill said:
Hi Havoc0040. Welcome to Physics Forums.

What is your question about this problem? What have you already tried?

The switch is now opened. What is the current through R11 immediately after the switch is opened? this is my question i thought it was 0 but that's not right
 

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