What is the maximum value of the current through the inductor?

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SUMMARY

The discussion centers on calculating the maximum current through an inductor in a circuit involving two identical capacitors (A and B) and an inductor (L). The problem is approached using Kirchhoff’s loop rule and the equations for capacitors and inductors. The maximum current is derived from the initial conditions at time t₀, where the current is CE/√LC, and the subsequent behavior of the circuit is analyzed using the principles of simple harmonic motion (SHM). The participants emphasize the importance of correctly assigning charges and understanding the configuration of the capacitors in relation to the inductor.

PREREQUISITES
  • Understanding of Kirchhoff’s loop rule
  • Familiarity with capacitor and inductor equations (Q=CV, E=-LdI/dt)
  • Knowledge of simple harmonic motion (SHM) principles
  • Ability to analyze circuits with capacitors in series and parallel
NEXT STEPS
  • Study the derivation of current in RLC circuits using differential equations
  • Learn about energy conservation in LC circuits
  • Explore the effects of switching in RLC circuits on transient responses
  • Investigate the role of equivalent capacitance in complex circuits
USEFUL FOR

Students studying electrical engineering, circuit designers, and anyone preparing for exams involving circuit analysis and electromagnetic theory.

  • #31
haruspex said:
Whoops... my mistake :oops:. Your answer in post #27 was correct.

But answer is not matching. They say its 380/13 for capacitor C3.[emoji27]
 
Last edited:
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  • #32
randomgamernerd said:
40, 30, 10 are the potential difference applied to charge the capacitros, not the charge itself.
Good point.. but then, for C1, 40*2=?
 
  • #33
haruspex said:
Good point.. but then, for C1, 40*2=?
i am so sorry, it will be 80 and I have written 60. I am so sorry...I have got the answer now...I have this exam in a week and i don't know what will happen if i do mistakes like this. Thank you sir for your patience and helping me out. And also for reminding me of this concept. Thank you so much.
 
  • #34
randomgamernerd said:
i am so sorry, it will be 80 and I have written 60. I am so sorry...I have got the answer now...I have this exam in a week and i don't know what will happen if i do mistakes like this. Thank you sir for your patience and helping me out. And also for reminding me of this concept. Thank you so much.
There's no need to apologise to me. I made mistakes too on this one.
 
  • #35
haruspex said:
There's no need to apologise to me. I made mistakes too on this one.

[emoji28]
 

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