What is the circle symbol name and what does it mean?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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What is the circle symbol name and what does it mean? Topic is electrical engineering

Transcribed Image Text:# First Order RC Circuit
**Figure 3 - First Order RC Circuit:**
This figure illustrates two parts:
(a) **Original RC Circuit**:
- Consists of resistors \( R_1 = 2 \, \text{k}\Omega \) and \( R_2 = 1 \, \text{k}\Omega \), a voltage source \( E = 5 \) volts, and a capacitor \( C = 10 \, \text{nF} \).
- The switch is closed at \( t = 0 \).
(b) **Thevenin Equivalent of Original RC Circuit**:
- Includes the Thevenin resistance \( R_{\text{TH}} \) and Thevenin voltage \( V_{\text{TH}} \) across terminals a-b with the capacitor \( C \).
**Notes and Calculations**:
- **Given Parameters:**
- \( R_1 = 2 \, \text{k}\Omega \)
- \( R_2 = 1 \, \text{k}\Omega \)
- \( E = 5 \, \text{V} \)
- \( C = 10 \, \text{nF} \)
- **Calculations:**
- The Thevenin voltage \( V_{\text{TH}} = 5 \, \text{V} \).
- **Problem:**
- Determine the time constant \( \tau \) when the switch is closed at \( t = 0 \).
- Given \( v_C(0^-) = 0 \), implying the capacitor was fully discharged before \( t = 0 \).
- **Equations and Expressions:**
- \( v_C(t) \) and \( i_C(t) \) for \( t > 0 \).
The text notes additional handwritten annotations which may include specific formulas or extra details for further calculations.
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