Light globe brightness change with voltage

In summary, the brightness of a light globe increases with voltage, but there is a limit to how bright it can get without causing damage. Different types of light bulbs can also affect the brightness at the same voltage. The brightness of a light globe can decrease over time due to materials degradation, and changing the voltage can affect its lifespan. It is important to follow the recommended voltage for a specific light bulb to ensure its optimal performance and lifespan.
  • #1
Crushgear64
12
0

Homework Statement



If a 6v incandescent globe is running at 6v with 0.6amps has a 0.909 resistor introduced into it's circuit which drops the voltage across it to 5.501v and 0.55amps how much does the brghtness change?

The Attempt at a Solution



5.501*0.55/6*0.6 original brightness. Is it as simple as this? Because I know globes are a non-ohmic conductor.
 
Last edited:
Physics news on Phys.org
  • #2
There is enough information in the question to allow you to calculate if the resistance has changed.

I believe your approach is correct (eg ratio of power) but perhaps add what other assumption you have to make about a bulbs brightness.
 

1. How does the brightness of a light globe change with voltage?

The brightness of a light globe increases as the voltage increases. This is because the higher the voltage, the more energy is provided to the light bulb, resulting in a brighter glow. However, this relationship is not linear, and a small increase in voltage can lead to a significant increase in brightness.

2. Is there a limit to how bright a light globe can get with increased voltage?

Yes, there is a limit to how bright a light globe can get with increased voltage. This limit is determined by the design and materials of the light bulb. If the voltage is too high, it can cause the light bulb to overheat and potentially explode. Therefore, it is important to follow the recommended voltage for a specific light globe.

3. Why do some light globes have different brightness levels at the same voltage?

The brightness of a light globe is not only determined by the voltage, but also by the type of light bulb and its design. Different types of light bulbs, such as incandescent, LED, or fluorescent, have different materials and structures that can affect the brightness at the same voltage.

4. Does the brightness of a light globe decrease over time as the voltage remains the same?

Yes, the brightness of a light globe can decrease over time even with the same voltage. This is due to the gradual degradation of the materials used in the light bulb, causing it to emit less light. This is why light bulbs need to be replaced periodically.

5. Can changing the voltage of a light globe affect its lifespan?

Yes, changing the voltage of a light globe can affect its lifespan. If the voltage is too high, it can shorten the lifespan of the light bulb by causing it to overheat. On the other hand, if the voltage is too low, the light bulb may not produce enough light, and it may last longer than its intended lifespan. It is important to use the recommended voltage for a specific light bulb to ensure its lifespan is not affected.

Similar threads

  • Introductory Physics Homework Help
Replies
14
Views
617
  • Introductory Physics Homework Help
Replies
3
Views
2K
  • Introductory Physics Homework Help
Replies
2
Views
3K
  • Introductory Physics Homework Help
Replies
4
Views
1K
  • Introductory Physics Homework Help
Replies
29
Views
2K
  • Introductory Physics Homework Help
Replies
3
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
3K
  • Introductory Physics Homework Help
Replies
23
Views
2K
  • Introductory Physics Homework Help
Replies
8
Views
2K
Back
Top