0
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.
It 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.
Add your answer:
Earn +20 pts
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 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.
What is an ohmic conductor?
ohmic conductors are those which obey ohm's law
Is a light bulb a conductor?
No, a light bulb is not a conductor. A light bulb is made of materials that act as insulators, such as glass and tungsten. The filament inside the light bulb serves as a resistor to generate light when electricity passes through it.
Explain how you can test whether something is an insulator or conductor?
You can test if something is an insulator or conductor by connecting a circuit with a power source and a light bulb. If the material allows the light bulb to turn on, it is a conductor. If the light bulb does not turn on, it is an insulator.
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,...
Will a light bulb turn on or off when it is touched by a conductor to complete the circuit?
If a light bulb is touched by a conductor to complete the circuit, it will turn on if the circuit is closed and working properly. The conductor helps to create a path for the electricity to flow from the power source to the light bulb, allowing it to illuminate.
Is light bulb holder electrical conductor?
yes
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.
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:)
How can you make a circuit to find out if an object is an insulator or a conductor?
You can create a simple circuit with a battery, a light bulb, and wires. Connect the wires to the battery and light bulb, then touch the ends of the wires to the object in question. If the light bulb lights up, the object is a conductor as it allows the flow of electricity. If the light bulb does not light up, the object is an insulator as it does not allow the flow of electricity.
Is the material inside a light bulb a conductor or resistance?
It has high resistance.
