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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 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.
um.........I don't know.I know something that will more and likely help you.Try googling it.I hope that helps. Or a dictionary or encyclopedia. Or a local library. One of those places will surley help you! Have great day and I hope you find the answer!
The incandescent light bulb sends electrical current through a Tungsten filiment which resist the flow of current (it is the resistor). This resistance generates heat and makes the filiment glow. Tungsten has an extremely high melting point so it makes a good filiment for a bulb as it can glow brightly for a long time before giving out.
It is an insulator because it brings in light and it has metal at the bottom. (metal is an insulator)
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Is a geyser a inductive load?
No, a geyser is a resistive load.
What is the phase angle difference between inductive load and resistive load?
The phase angle is defined as the angle by which the load current leads or lags the supply voltage.For a purely-resistive load, the phase angle is zero, because the load current is in phase with the supply voltage.For a purely-inductive load, the phase angle is 90 degrees lagging.But few loads are either purely-resistive or purely-inductive; typically, most loads are resistive-inductive. This means that, typically, the phase angle lies somewhere between zero and 90 degrees.
Are solenoid valves resistive loads or inductive loads?
Resistive Load An electrical load which is characteristic of not having any significant inrush current. When a resistive load is energised, the current rises instantly to it's steady-state value, without first rising to a higher value. An electrical load in which voltage and current are converted to energy in the form of heat; i.e., an electrical heater, incandescent bulb. Inductive Load An electrical load which pulls a large amount of current (an inrush current) when first energized. After a few cycles or seconds the current "settles down" to the full-load running current. The time required for the curren to "settle down" depends on the frequency or/and the inductance value of the Inductive load
What is non-inductive load?
non- inductive load is without motor and transformer loads are non-inductive load, purely resistive are capacitive loads phase angle is unity are leading PF A non-inductive load is a load whose current does not change instantaneously.
What is Pure Resistive?
A purely resistive load is one in which there is no capacitive or inductive reactance. Whe driven by an AC voltage source, such a load will have no shift in phase angle between voltage and current.
Do air conditioners use resistive load or inductive load?
resistive loadAnswerIf the current is driving a motor, then the load is resistive-inductive.
Fan is inductive load or resistive load?
Inductive since it has a motor with windings.
Is a geyser a inductive load?
No, a geyser is a resistive load.
In a circuit with resistive and inductive load what happens to the power factor as the resistive load increases?
The PF will increase
What are the specifications of resistance?
specification of inductive load,capactive load,resistive load in laboratory
What is the phase angle difference between inductive load and resistive load?
The phase angle is defined as the angle by which the load current leads or lags the supply voltage.For a purely-resistive load, the phase angle is zero, because the load current is in phase with the supply voltage.For a purely-inductive load, the phase angle is 90 degrees lagging.But few loads are either purely-resistive or purely-inductive; typically, most loads are resistive-inductive. This means that, typically, the phase angle lies somewhere between zero and 90 degrees.
Are solenoid valves resistive loads or inductive loads?
Resistive Load An electrical load which is characteristic of not having any significant inrush current. When a resistive load is energised, the current rises instantly to it's steady-state value, without first rising to a higher value. An electrical load in which voltage and current are converted to energy in the form of heat; i.e., an electrical heater, incandescent bulb. Inductive Load An electrical load which pulls a large amount of current (an inrush current) when first energized. After a few cycles or seconds the current "settles down" to the full-load running current. The time required for the curren to "settle down" depends on the frequency or/and the inductance value of the Inductive load
What is non inductive load?
non- inductive load is without motor and transformer loads are non-inductive load, purely resistive are capacitive loads phase angle is unity are leading PF A non-inductive load is a load whose current does not change instantaneously.
What is non-inductive load?
non- inductive load is without motor and transformer loads are non-inductive load, purely resistive are capacitive loads phase angle is unity are leading PF A non-inductive load is a load whose current does not change instantaneously.
How does the ac generator output is affected by the resistive inductive and capacitive load?
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What is Pure Resistive?
A purely resistive load is one in which there is no capacitive or inductive reactance. Whe driven by an AC voltage source, such a load will have no shift in phase angle between voltage and current.
Which home appliances have a resistive load and which home appliances have an inductive load?
water heaters electric stoves toasters space heaters incandescent lights are resistive loads a/c and fans iceboxs and anything with a motor is inductive Type your answer here...
