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For a material to be 'ohmic' or 'linear', it must obey Ohm's Law. For Ohm's Law to apply, the ratio of voltage to resistance must be constant for variations in voltage.
An incandescent lamp's filament is manufactured from tungsten, which is 'non-ohmic' or 'non-linear' because the ratio of voltage to current changes for variations in voltage. In fact, MOST conductors and electrical devices (such as diodes) are non-ohmic.
If you were to conduct an experiment that allowed you to record the variation if current flowing through a tungsten filament for variations in voltage, the result would be a curved graph line -in other words, a 'non-linear' (therefore, 'non-ohmic'), graph line.
So, to directly answer your question, NO, a tungsten filament is not an ohmic material.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoIt depends on the part of the bulb you examine. The glass envelope and vacuum are very good insulators (do not pass a current) and the base is a good conductor as it does not heat up as it transmits the current. The filament (the part that gives off light) has a high resistance to current (is a poor conductor) and heats up as current flows through it. The hot metal is the light source.
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Is wood can let the bulb to light up?
Wood can not let a light bulb light up because wood is a very poor conductor of electicity. A better conductor would be types of metals such as copper or gold, which is used in many electronics.
What is a C.Q. light bulb?
what is a C. O. light bulb?
Is a light bulb matter?
Yes, a light bulb is matter.
Is a light bulb renewable or nonrenewable?
The light bulb its self is non renewable, it is replaceable. The electricity that powers the light bulb can be renewable.
What is the least efficient kind of light bulb?
It is the Incandescent light bulb. Most of the energy are lost as heat
What are ohmic and non - ohmic conductors?
ohmic conductor does obey ohm 's law. non ohmic conductor does not obey ohm's law.
Is a light bulb a conductor?
no
What is an ohmic conductor?
ohmic conductors are those which obey ohm's law
Is a light bulb an insulator or conductor?
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.
Is diode ohmic or non-ohmic conductor?
Diode is a non-ohmic conductor since in diodes current-voltage relation ship does't obey Ohm's law....the relationship between current and voltage is nonlinear here,...
Is light bulb holder electrical conductor?
yes
Is the 10 ohm resistor ohmic or non-ohmic?
If it has constant temperature (one can do this by dipping it in a beaker of water) it can be considered an ohmic conductor since Ohm's law states that the Voltage and amperage are directly proportional in a metallic conductor of constant temperature.
Why does a lemon light a bulb?
A lemon can power a light bulb because of the acid in it. The acid is used as a conductor and powers the lemon.
Is the material inside a light bulb a conductor or resistance?
It has high resistance.
What are Ohmic and Non - Ohmic conductor?
ohmic ocnductor is a material which obeys ohm's law: i.e. the voltage and current are directly proportional 2 each other anda non-ohmic ocnductor is a material which doesn't obey ohm's law:)
Is wood can let the bulb to light up?
Wood can not let a light bulb light up because wood is a very poor conductor of electicity. A better conductor would be types of metals such as copper or gold, which is used in many electronics.
Why toothpick can't let the bulb light up?
Because the bulb fused or toothpick is not the good conductor of eletricity.
