Solve LC and LRC Circuits Kirchhoff's Rule Problem

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Homework Help Overview

The discussion revolves around a problem involving an LC circuit where a capacitor is charged and then connected to an inductor. The original poster seeks to apply Kirchhoff’s loop rule to analyze the circuit and determine various parameters such as charge, current, frequency, and energy at specific times.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to apply Kirchhoff's loop rule but expresses uncertainty about how to proceed. They mention having calculated the natural angular frequency and related parameters but seek clarification on the application of the rule. Other participants prompt for an understanding of Kirchhoff's loop rule.

Discussion Status

The discussion is in the early stages, with participants encouraging the original poster to demonstrate their understanding before receiving further assistance. There is an emphasis on the need for effort to be shown in the problem-solving process.

Contextual Notes

Participants note that the problem involves a negligible resistance scenario and that the original poster has provided some calculations but is primarily focused on understanding Kirchhoff's rule in this context.

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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.
 
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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.
 
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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
 
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What is Kirchoff’s loop rule as you understand it?
 

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