It is the filament.
It is the tungsten element in a filament light bulb that is the resistor. It is this resistance that produces light and heat.
The light glows because of the hot Filament.
The light bulb filament is made of a material fundamentally like the material used in resistors.
A lightbulb filament.
It is a conductor, but the filament is a resistor : as current flows through the filament, some of the energy is released as heat and light.
Among others, the filament of an incandescent light bulb is a resistor- which gives off heat and light.
As electrons enter the filament of a lightbulb it must first go through a resistor that compresses the electrons into a very small and fine space. After the electrons pass through the resistor it goes into the filament and the electrons release their energy in the form of electromagnetic radiation. In otherwords, the electrons give off light when they release their energy.
it is made of tungsten and is a resistor when current flows thru it it heats up and glows
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.
The filament of a light bulb isn't like a resistor ... it is a resistor. The only difference from the ones on circuit boards is the it's designed to operate at a much higher temperature. So hot that it glows. The glass envelope is there to prevent oxygen from getting in and promptly burning it. When the filament becomes too hot it breaks breaking the current that was lighting it in the first place. That is why the light bulb "burns" out.
First, you use the mechanical energy to power a generator. Then you use the electricity from the generator to power a light bulb. Because the filament is a resistor, it converts enough of the electricity into heat energy to cause the filament to glow.
A resistor works by limiting the current that goes through it. When current is limited, then voltage across the resistor also changes. We use many forms of resistors in our normal day. Lightbulbs are infact all resistors in one way or another. When the filament in a lightbulb heats up, the resistance increases. When resistance increases, the current is reduced. In the end, the current has been reduced so much that it can no longer carry on heating up the filament. The bulb is then thermally stable and shines for our pleasure.
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.
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 0.833 ampere.When cold the filament typically has a resistance of only 10 ohms which increases as the filament heats up.CommentLight bulbs, or lamps, are not known as 'resistors'. They certainly have 'resistance', but they are not resistors. A resistor is an electrical component designed to provide a specific value of resistance into a circuit.
A filament transformer is a machine that supplies filament for electron tubes. There are different types of filament transformers.
Filament was made from plastic. The filament was very stable and smooth.
Conductor, otherwise it wouldn't light up. The current flows through it, but it has a resistance to the flow (it is a resistor) and releases some energy as heat and light.
In some circumstances a filament bulb is used as a variable resistor. As the filament heats up, its resistance increases. This effect is used in some automatic gain control circuits; as the signal level increases, the changing resistance of the bulb can modify the feedback level in order to hold the level constant.
The filament of a lamp is NOT an 'ohmic' resistor. It is, in fact, 'non-ohmic'.The term, 'ohmic' (or 'linear'), to those materials that obey Ohm's Law. Materials that do not obey Ohm's Law are called 'non-ohmic' (or 'non-linear').For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. This is not the case for tungsten, from which a lamp's filament is manufactured.As the voltage across a tungsten filament is increased, the ratio of voltage to current changes -if you were to plot a graph, you would see a curve, rather than a straight line. This clearly confirms that tungsten does NOT obey Ohm's Law.
A power stroke.
The heat and light of the filament in an incandescent bulb is simply the powerdissipated by the resistance of the filament. The power dissipated by a resistoris simply (current through it)2 times (its resistance). A thicker wire used as thefilament has less resistance, which means that for any given current throughit, it dissipates less power than a thinner filament would.In simplest terms, the thicker the filament is, the more juice you must jamthrough it to make it glow.Another AnswerIncreasing the thickness of a tungsten wire will increase its cross-sectional area which will reduce its resistance. The filament of a higher-wattage lamp has a lowerresistance than the filament of a lower-wattage lamp, This is so because the power of a lamp filament is determined by dividing the square of the voltage by its resistance -the lower the resistance, the higher the power output. So reducing the resistance (by increasing its thickness) of the tungsten filament will increase its power output and, therefore, increase its brightness.