Solve LC and LRC Circuits Kirchhoff's Rule Problem

  • Thread starter Thread starter carold
  • Start date Start date
  • Tags Tags
    Circuits Lc Lrc
AI Thread Summary
The discussion revolves around solving an LC circuit problem using Kirchhoff's loop rule, where a 300-V power supply charges a 25-μF capacitor before it is connected to a 10-mH inductor. Participants emphasize the importance of showing effort in homework questions to receive tutorial help. The user has calculated the natural angular frequency, finding a frequency of 320 Hz and a period of 3.1 ms, and is seeking guidance specifically on applying Kirchhoff's rule. Clarification on Kirchhoff's loop rule is requested to better understand its application in this context. The conversation highlights the necessity of demonstrating initial attempts in problem-solving for effective assistance.
carold
Messages
2
Reaction score
1
Homework Statement
A 300-V dc power sup- ply is used to charge a 25-μF capacitor. After the capacitor is fully charged, it is disconnected from the power supply and connected across a 10-mH inductor (at t = 0).
(a) Assume that the resistance in the circuit is negligible. Apply Kirchhoff’s loop rule to to find the capacitor charge, q(t), and the current, i(t).
Find the frequency and period of oscillation of the circuit. Find the magnetic energy and elec- tricenergyatt=0andt=1.2ms.
Relevant Equations
How do I use Kirchoff's rule here?
Problem Statement: A 300-V dc power sup- ply is used to charge a 25-μF capacitor. After the capacitor is fully charged, it is disconnected from the power supply and connected across a 10-mH inductor (at t = 0).
(a) Assume that the resistance in the circuit is negligible. Apply Kirchhoff’s loop rule to to find the capacitor charge, q(t), and the current, i(t).
Find the frequency and period of oscillation of the circuit. Find the magnetic energy and electric energy at t=0 and t=1.2ms.
Relevant Equations: How do I use Kirchoff's rule in this example?
I calculated natural angular frequency, got f=320 Hz and T =1/f =3.1 ms
I also know how to calculate magnetic and electric energy having I and q
I just need help with the Kirchoff's rule.
 
Last edited:
Physics news on Phys.org
Welcome to the PF.

We do not allow homework questions with no effort shown. Please make an attempt at the questions, so that we can offer tutorial help. Thanks.
 
  • Like
Likes carold
berkeman said:
Welcome to the PF.

We do not allow homework questions with no effort shown. Please make an attempt at the questions, so that we can offer tutorial help. Thanks.
I'm sorry, I just fixed it
 
  • Like
Likes berkeman
What is Kirchoff’s loop rule as you understand it?
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

Self-inductance of LC circuit given rate of capacitor discharge.
Replies
6
Views
860
Determining Inductance L in an LC Circuit
Replies
5
Views
2K
LC oscillations - two capacitors and an inductor
Replies
15
Views
519
Using Kirchhoff's Rule - Theory question
Replies
8
Views
2K
Find the charge q(t) for an LC circuit
Replies
2
Views
2K
Sign conventions for Kirchhoff's loop rule
Replies
7
Views
1K
What is the maximum value of the current through the inductor?
Replies
34
Views
7K
Solving KVL in a Multiloop Circuit with Battery & LC Circuits
Replies
18
Views
2K
What is the role of cosφ in calculating power in LRC series circuits?
Replies
2
Views
2K
Solving for Imax and Energy in an LC Circuit: Homework Help
Replies
28
Views
4K

Hot Threads

Recent Insights

Back
Top