Filament light globe current

In summary, the current through a filament light globe is greater in the first few milliseconds after it is turned on due to the temperature dependence of its resistance. It is better to have headlights in a motorcycle vehicle connected in parallel rather than in series because in series, if one headlight fails, the current would no longer be conducted to the other headlight. Additionally, there is a homework help section in this forum for future assistance.
  • #1
cseet
40
0
Hi there,

can anyone pls explain why
1. the current through a filament light globe is greater in the first few milliseconds after it is turned on before it reaches it's "steady" glow?

2. is it better to have headlights in a motos vehicle connected in parallel rather than in series?

greatly appreciated!
Cseet
 
Physics news on Phys.org
  • #2
1. filliment resistance is temperature depentent.

2. In series one goes out both go out. In parallel they go out one at a time.


You do realize we have a homework help forum?
 
  • #3
The resistance of an electrical conductor varies with it's temperature.

Wired in series, if one headlight failed, the current would no longer be conducted to the other headlight.
 
  • #4


Hi there,

thanks for your help.

I now realized that there's a homework help section... I'm new to this forum. thanks again
cseet
 

1. What is filament light globe current?

Filament light globe current is the electrical current that flows through the filament of an incandescent light bulb. This current is responsible for heating up the filament and causing it to emit light.

2. How is filament light globe current measured?

Filament light globe current is typically measured in amperes (A) using a multimeter or ammeter. The current can be measured by connecting the multimeter in series with the light bulb.

3. How does the current affect the brightness of a filament light globe?

The current directly affects the brightness of a filament light globe. As the current increases, the filament heats up more and emits more light, resulting in a brighter light bulb. Conversely, a decrease in current will result in a dimmer light bulb.

4. What is the relationship between filament light globe current and voltage?

The relationship between filament light globe current and voltage is described by Ohm's law, which states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance. This means that as the voltage increases, the current also increases, assuming the resistance of the filament remains constant.

5. How does the current affect the lifespan of a filament light globe?

The current can greatly affect the lifespan of a filament light globe. A higher current can cause the filament to heat up more quickly and shorten its lifespan. On the other hand, a lower current can prolong the life of the light bulb. It is important to use the correct voltage and wattage for a light bulb to ensure optimal lifespan.

Similar threads

Final Temperature of a Lightbulb filament
    • Introductory Physics Homework Help
Replies
5
Views
3K
Electricity: Which globe uses most energy?
    • Introductory Physics Homework Help
Replies
1
Views
2K
B Designing a current sensor for 50mA up to several dozen Amps
    • Electromagnetism
Replies
17
Views
1K
Klystron beam current, drive frequency, LHC CW example
    • High Energy, Nuclear, Particle Physics
Replies
2
Views
1K
Expressing current through a circuit
    • Introductory Physics Homework Help
Replies
3
Views
1K
Capacitor in Circuit: Charging Globe & Dimming Light
    • Introductory Physics Homework Help
Replies
7
Views
2K
Understanding the Inner Workings of Plasma Globes: Explained and Unveiled"
    • Electromagnetism
Replies
4
Views
4K
How Can an LC Circuit Prevent Light Bulb Filament Damage at Turn-On?
    • Engineering and Comp Sci Homework Help
Replies
2
Views
3K
Solve Open Circuit Problem 3: Two Batteries and 3 Bulbs
    • Introductory Physics Homework Help
Replies
4
Views
19K
Light waves from a normal house hold globe effecting a dc circuit. Why?
    • Electrical Engineering
Replies
21
Views
3K

Hot Threads

Recent Insights

Back
Top