1. In the circuit shown in Figure 1, let s(t) = 5 u(t), R1 = 20, R2 = 12, R3 = 12, L= 0.5H, C = 0.2F, i(0°) = 2A, v(0') = 3V. R1 Va R2 Vo a i(0-) v(0-) ㅜ vo(t) R3

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
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**Circuit Analysis Problem:**

1. **Circuit Definition**

   In the circuit shown in Figure 1, let's define the parameters as follows:

   \( v_s(t) = 5 \, u(t) \), \( R_1 = 2 \, \Omega \), \( R_2 = 1 \, \Omega \), \( R_3 = 1 \, \Omega \), 

   \( L = 0.5 \, \text{H} \), \( C = 0.2 \, \text{F} \), \( i(0^-) = 2 \, \text{A} \), \( v(0^-) = 3 \, \text{V} \).

**Figure 1 Description:**

- The circuit consists of:
  - A voltage source \( v_s(t) \) connected to resistor \( R_1 \) and ground.
  - Resistor \( R_1 \) leads to node \( a \), connected to an inductor \( L \) where current \( i(t) \) flows downwards.
  - Node \( a \) is also connected to resistor \( R_2 \), leading to node \( b \).
  - Node \( b \) is connected to capacitor \( C \), with voltage \( v_o(t) \) across it, and resistor \( R_3 \).

**Tasks:**

(a) **s-Domain Circuit:**
   - Draw the circuit in the s-domain considering \( t \geq 0 \).

(b) **Node Equation at Node \( a \):**
   - Develop a node equation by summing currents leaving node \( a \).

(c) **Node Equation at Node \( b \):**
   - Write a node equation at node \( b \) by summing currents.
   - Define \( V_b(s) = V_o(s) \).

(d) **Find \( V_o(s) \):**
   - Calculate the expression for \( V_o(s) \) in the s-domain.

(e) **Find \( v_o(t) \):**
   - Obtain \( v_o(t) \) by determining the inverse Laplace transform of \( V_o(s) \).
Transcribed Image Text:**Circuit Analysis Problem:** 1. **Circuit Definition** In the circuit shown in Figure 1, let's define the parameters as follows: \( v_s(t) = 5 \, u(t) \), \( R_1 = 2 \, \Omega \), \( R_2 = 1 \, \Omega \), \( R_3 = 1 \, \Omega \), \( L = 0.5 \, \text{H} \), \( C = 0.2 \, \text{F} \), \( i(0^-) = 2 \, \text{A} \), \( v(0^-) = 3 \, \text{V} \). **Figure 1 Description:** - The circuit consists of: - A voltage source \( v_s(t) \) connected to resistor \( R_1 \) and ground. - Resistor \( R_1 \) leads to node \( a \), connected to an inductor \( L \) where current \( i(t) \) flows downwards. - Node \( a \) is also connected to resistor \( R_2 \), leading to node \( b \). - Node \( b \) is connected to capacitor \( C \), with voltage \( v_o(t) \) across it, and resistor \( R_3 \). **Tasks:** (a) **s-Domain Circuit:** - Draw the circuit in the s-domain considering \( t \geq 0 \). (b) **Node Equation at Node \( a \):** - Develop a node equation by summing currents leaving node \( a \). (c) **Node Equation at Node \( b \):** - Write a node equation at node \( b \) by summing currents. - Define \( V_b(s) = V_o(s) \). (d) **Find \( V_o(s) \):** - Calculate the expression for \( V_o(s) \) in the s-domain. (e) **Find \( v_o(t) \):** - Obtain \( v_o(t) \) by determining the inverse Laplace transform of \( V_o(s) \).
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