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How is resistance used to create light in a tungsten light bulb?
Wiki User
∙ 9y ago
Electricity creates heat when flowing through a resistor such as the filament in a tungsten light bulb, and, since the heat can not be readily conducted away in the near vacuum inside a light bulb, the heat eventually raises the temperature of the filament to a value that leads to radiation of light from the hot filament.
Wiki User
∙ 9y ago
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What element makes light bulb filaments?
Tungsten
Suggest the physical property that can render tungsten suitable for making filament of tungsten light bulb?
The physical property that can render tungsten suitable for making filament of tungsten light bulbs is incandescence.
What element is used in a light bulb as a filament?
Usually tungsten.
Why is tungsten metal used in filaments of light bubls?
It is a part of a bulb
What element is essential in a light bulb?
In the old style filament lightbulbs it was tungsten (wolfram).
What are some devices that are wired such that they have a high resistance in order to create heat?
A light bulb is the best example. The tungsten creates such a high resistance that all the accumulated heat produces light energy.
What is the general resistance of a tungsten filament?
The resistance of the filament in a light bulb is(voltage at which the bulb is designed to operate)2/(the rated power/watts of the bulb)
Light bulbs how does running electricity through the bulb create light?
The electricity runs through a coil of Tungsten. Tungsten has a very high resistance. As per Joule's Law, energy radiated is directly proportional to resistance. The energy radiated is so large that the coil starts to glow and light is produced.
What was a resistance invention?
The incandescent light bulb. The tungsten filament lights due to it's resistance of the current flowing through it.
What type of gas is in a tungsten-halogen light bulb?
Halogen gas is in a Tungsten-Halogen Light Bulb.
Light bulb filament?
What is Tungsten
How is the filament of the light bulb a resistor?
Most simple incandescent light bulbs are made of a thin section of tungsten through which the current flows. This section of tungsten is called a "filament". The tungsten filament has electrical resistance and so is a resistor. As a resistor it develops a voltage drop. This voltage drop multiplied by the amperage passing through it equals the wattage of the bulb. The heated tungsten gets to thousands of degrees above room temperature and becomes hot enough to produce yellow-white visible light. As a resistor, the tungsten light bulb has a positive resistance coefficient. This means that the electrical resistance goes up when the filament becomes hot. For example, a 100 watt light bulb operated at 120 volts - it does not matter if it is AC or DC for this calculation - will have a resistance of 144 ohms when hot and draw .833 ampere. When cold the filament typically has a resistance of only 10 ohms which increases as the filament heats up.
What is always in light bulb filaments?
Tungsten is always in light bulb filaments :)
How many filaments did it take Thomas Edison to create the light bulb?
238, until he settled upon tungsten.
What is the filament in the light bulb called?
Tungsten.
What metal element is in a light bulb?
Tungsten
What is the filament inside a light bulb?
Tungsten
