The battery in the middle wire is flipped around, and the switch is opened, as shown at right. Rank the brightness of the three bulbs when the switch is open. Explain your reasoning. The switch is now closed. f) 60 reasoning. 3 2 Will the current through bulb 3 be zero or non-zero? Explain your reasoning. Rank the brightness of the three bulbs when the switch is closed. Explain your

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**Text Transcription:**

The battery in the middle wire is flipped around, and the switch is opened, as shown at right.

e) **Question:** Rank the brightness of the three bulbs when the switch is open. Explain your reasoning.

The switch is now closed.

f) **Question:** Will the current through bulb 3 be zero or non-zero? Explain your reasoning.

g) **Question:** Rank the brightness of the three bulbs when the switch is closed. Explain your reasoning.

**Diagram Explanation:**

The diagram on the right shows a circuit with the following components:

1. **Two Batteries (Vb):** 
   - One battery is connected in series with bulb 1.
   - The other battery is placed in the middle wire which is connected in series with bulb 2 and the switch.

2. **Three Bulbs:**
   - **Bulb 1:** Positioned above the first battery.
   - **Bulb 2:** Positioned below the second battery.
   - **Bulb 3:** Connected in a separate loop with the switch.

3. **Switch:**
   - Located on the lower right, connecting the path from bulb 2 to bulb 3.

The circuit is arranged to evaluate the changes in brightness of the bulbs due to different configurations of the switch (either open or closed).
Transcribed Image Text:**Text Transcription:** The battery in the middle wire is flipped around, and the switch is opened, as shown at right. e) **Question:** Rank the brightness of the three bulbs when the switch is open. Explain your reasoning. The switch is now closed. f) **Question:** Will the current through bulb 3 be zero or non-zero? Explain your reasoning. g) **Question:** Rank the brightness of the three bulbs when the switch is closed. Explain your reasoning. **Diagram Explanation:** The diagram on the right shows a circuit with the following components: 1. **Two Batteries (Vb):** - One battery is connected in series with bulb 1. - The other battery is placed in the middle wire which is connected in series with bulb 2 and the switch. 2. **Three Bulbs:** - **Bulb 1:** Positioned above the first battery. - **Bulb 2:** Positioned below the second battery. - **Bulb 3:** Connected in a separate loop with the switch. 3. **Switch:** - Located on the lower right, connecting the path from bulb 2 to bulb 3. The circuit is arranged to evaluate the changes in brightness of the bulbs due to different configurations of the switch (either open or closed).
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