2. Refer to figure 1.B . The capacitor is initially uncharged. The switch S is closed at t = 0. Since the capacitor at t = 0+ behaves like a conducting wire[with zero resistance] and at t → 0o like an open circuit[ with infinite resistance]: (a) The effective resistance of the circuit at t = 0+ is: 4+ S = 5.6N (2)(8) (True, False) (b) After a very long time (t - o0) the effective resistance of the circuit is: 4 + 2 = 62 (True, False) (c) At t = 0+ the voltages across the 82 resistor and 22 resistor are the same. (True, False)

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### Figure 1: Circuit Diagrams

The image contains two circuit diagrams labeled (A) and (B).

#### Diagram (A)

- **Components:**
  - A switch labeled “S.”
  - A 6V battery.
  - Two resistors, each with a resistance of 1Ω.
  - A capacitor with a capacitance of 1F.

- **Configuration:**
  - The switch “S” is open in the diagram.
  - The 6V battery is placed in series with one of the 1Ω resistors.
  - The capacitor is connected in parallel with the second 1Ω resistor.

#### Diagram (B)

- **Components:**
  - A switch labeled “S.”
  - A 6V battery.
  - Three resistors with resistances of 4Ω, 8Ω, and 2Ω.
  - A capacitor with a capacitance of 1F.

- **Configuration:**
  - The switch “S” is open in the diagram.
  - The 6V battery is placed in series with the 4Ω resistor.
  - The capacitor is connected in parallel with the 8Ω resistor.
  - The 2Ω resistor is also connected in parallel within the main circuit loop.

These diagrams represent basic RC (resistor-capacitor) circuits, demonstrating series and parallel configurations for educational analysis of electrical circuits.
Transcribed Image Text:### Figure 1: Circuit Diagrams The image contains two circuit diagrams labeled (A) and (B). #### Diagram (A) - **Components:** - A switch labeled “S.” - A 6V battery. - Two resistors, each with a resistance of 1Ω. - A capacitor with a capacitance of 1F. - **Configuration:** - The switch “S” is open in the diagram. - The 6V battery is placed in series with one of the 1Ω resistors. - The capacitor is connected in parallel with the second 1Ω resistor. #### Diagram (B) - **Components:** - A switch labeled “S.” - A 6V battery. - Three resistors with resistances of 4Ω, 8Ω, and 2Ω. - A capacitor with a capacitance of 1F. - **Configuration:** - The switch “S” is open in the diagram. - The 6V battery is placed in series with the 4Ω resistor. - The capacitor is connected in parallel with the 8Ω resistor. - The 2Ω resistor is also connected in parallel within the main circuit loop. These diagrams represent basic RC (resistor-capacitor) circuits, demonstrating series and parallel configurations for educational analysis of electrical circuits.
2. Refer to figure 1.B. The capacitor is initially uncharged. The switch S is closed at t = 0.

Since the capacitor at t = 0⁺ behaves like a conducting wire (with zero resistance) and at t → ∞ like an open circuit (with infinite resistance):

(a) The effective resistance of the circuit at t = 0⁺ is: \( 4 + \frac{(2)(8)}{2+8} = 5.6Ω \) (True, False)

(b) After a very long time (t → ∞) the effective resistance of the circuit is: \( 4 + 2 = 6Ω \) (True, False)

(c) At t = 0⁺ the voltages across the 8Ω resistor and 2Ω resistor are the same. (True, False)

(d) At t = 0⁺ the voltage across 4Ω, 8Ω, and 2Ω resistors are 4.3V, 1.7V, and 1.7V respectively. (True, False)

(e) At t → ∞ the voltage across the 8Ω resistor is zero because the capacitor is fully charged and lets no current pass through it (behaves like an open circuit). (True, False)

(f) At t → ∞ the current is \( \frac{6V}{(2+4)Ω} = 1A \). (True, False)

(g) At t → ∞ the voltage across the 2Ω is 2V. (True, False)

(h) At t → ∞ the voltage across the 1F capacitor is 2V. (True, False)
Transcribed Image Text:2. Refer to figure 1.B. The capacitor is initially uncharged. The switch S is closed at t = 0. Since the capacitor at t = 0⁺ behaves like a conducting wire (with zero resistance) and at t → ∞ like an open circuit (with infinite resistance): (a) The effective resistance of the circuit at t = 0⁺ is: \( 4 + \frac{(2)(8)}{2+8} = 5.6Ω \) (True, False) (b) After a very long time (t → ∞) the effective resistance of the circuit is: \( 4 + 2 = 6Ω \) (True, False) (c) At t = 0⁺ the voltages across the 8Ω resistor and 2Ω resistor are the same. (True, False) (d) At t = 0⁺ the voltage across 4Ω, 8Ω, and 2Ω resistors are 4.3V, 1.7V, and 1.7V respectively. (True, False) (e) At t → ∞ the voltage across the 8Ω resistor is zero because the capacitor is fully charged and lets no current pass through it (behaves like an open circuit). (True, False) (f) At t → ∞ the current is \( \frac{6V}{(2+4)Ω} = 1A \). (True, False) (g) At t → ∞ the voltage across the 2Ω is 2V. (True, False) (h) At t → ∞ the voltage across the 1F capacitor is 2V. (True, False)
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