Students in a physics lab use a battery and three identical lightbulbs to construct the circuit shown in Figure 1 above. The brightness of each bulb increases when the current through the bulb increases. (a) Which bulb, if any, is the brightest? Check the best option.
Students in a physics lab use a battery and three identical lightbulbs to construct the circuit shown in Figure 1 above. The brightness of each bulb increases when the current through the bulb increases. (a) Which bulb, if any, is the brightest? Check the best option.
College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![### Understanding Series and Parallel Circuits with Identical Lightbulbs
**Students in a physics lab use a battery and three identical lightbulbs to construct the circuit shown in Figure 1 above. The brightness of each bulb increases when the current through the bulb increases.**
#### Figure 1 Description
- A battery is connected in series with three identical lightbulbs labeled A, B, and C.
**(a) Which bulb, if any, is the brightest? Check the best option.**
- [ ] A
- [ ] B
- [ ] C
- [ ] All bulbs have the same brightness.
*Briefly explain your reasoning in terms of current and/or potential difference:*
---
**(b) The students observe the brightness of bulbs A, B, and C. The students then add a fourth lightbulb D, with a larger resistance than bulbs A, B, and C, as shown in Figure 2 (right).**
#### Figure 2 Description
- A battery is connected in series with three lightbulbs labeled A, B, and C, and then a fourth lightbulb D is added in parallel, which has a larger resistance than the first three.
**(i) Is bulb A now brighter than, dimmer than, or the same brightness as it was in the circuit in Figure 1?**
- [ ] Brighter
- [ ] Dimmer
- [ ] Same brightness
*Briefly explain your reasoning:*
---
**(ii) Is bulb B now brighter than, dimmer than, or the same brightness as it was in the circuit in Figure 1?**
- [ ] Brighter
- [ ] Dimmer
- [ ] Same brightness
*Briefly explain your reasoning:*
---
**(c) Bulbs A, B, and C each have resistance \(10 \, \Omega\), while bulb D has a resistance of \(30 \, \Omega\). In the circuit shown in Figure 2, the current through bulb D is measured to be \(0.20 \, \text{A}\). Calculate the potential difference across bulb A.**
**Explanation of Figures and Concepts:**
- **Figure 1:** A simple series circuit where each bulb shares the same current. The brightness is uniform among the bulbs since they have identical resistance.
- **Figure 2:** A more complex circuit with a fourth lightbulb D added in parallel. The](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdff7b543-7c53-4567-b2e2-82ba64a4a215%2F543f7e9e-499c-4942-a40e-563ccb670a75%2Fbzzgbsh.jpeg&w=3840&q=75)
Transcribed Image Text:### Understanding Series and Parallel Circuits with Identical Lightbulbs
**Students in a physics lab use a battery and three identical lightbulbs to construct the circuit shown in Figure 1 above. The brightness of each bulb increases when the current through the bulb increases.**
#### Figure 1 Description
- A battery is connected in series with three identical lightbulbs labeled A, B, and C.
**(a) Which bulb, if any, is the brightest? Check the best option.**
- [ ] A
- [ ] B
- [ ] C
- [ ] All bulbs have the same brightness.
*Briefly explain your reasoning in terms of current and/or potential difference:*
---
**(b) The students observe the brightness of bulbs A, B, and C. The students then add a fourth lightbulb D, with a larger resistance than bulbs A, B, and C, as shown in Figure 2 (right).**
#### Figure 2 Description
- A battery is connected in series with three lightbulbs labeled A, B, and C, and then a fourth lightbulb D is added in parallel, which has a larger resistance than the first three.
**(i) Is bulb A now brighter than, dimmer than, or the same brightness as it was in the circuit in Figure 1?**
- [ ] Brighter
- [ ] Dimmer
- [ ] Same brightness
*Briefly explain your reasoning:*
---
**(ii) Is bulb B now brighter than, dimmer than, or the same brightness as it was in the circuit in Figure 1?**
- [ ] Brighter
- [ ] Dimmer
- [ ] Same brightness
*Briefly explain your reasoning:*
---
**(c) Bulbs A, B, and C each have resistance \(10 \, \Omega\), while bulb D has a resistance of \(30 \, \Omega\). In the circuit shown in Figure 2, the current through bulb D is measured to be \(0.20 \, \text{A}\). Calculate the potential difference across bulb A.**
**Explanation of Figures and Concepts:**
- **Figure 1:** A simple series circuit where each bulb shares the same current. The brightness is uniform among the bulbs since they have identical resistance.
- **Figure 2:** A more complex circuit with a fourth lightbulb D added in parallel. The
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