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The filament in the bulb has resistance. The current flowing through the resistance of bulb causes the filament to dissipate energy in the form of heat and light. The filament is actually glowing white-hot because of the energy it is dissipating, thus giving off light.
Wiki User
∙ 16y ago
Wiki User
∙ 13y agoThe bulb glows because the electricity which is a form of energy which heats a wire inside of the bulb as it passes through. This gives a glow to the wire which is magnified by the curve of a bulb.
Wiki User
∙ 6y agoThe bulb glows indicating that there is current flow. If there is any ammeter in the circuit, it reads when there is current flow in the circuit
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Does iron glow when you put electricity through it?
Many metals will glow when heated to a high enough temperature. The metal (like in a light bulb filament) is heated up from the current passing through it. Most incandescent light bulbs use a tungsten filament. Appliance Heating elements (like in an electric oven), are usually composed of nickel and chromium. You can visually verify that Heating elements in ovens and toasters glow, as well.
Why does a fluorescent light bulb glow when rubbed with a piece of nylon or silk in the dark?
Because the electrons from the Nylon cloth or silk are being passed to the light bulb
When an electric stove element is hot enough it gives off a dull red glow When it cools to the point that it no longer glows what happens?
same ...
What is the glowing trail that results when a meteoroid burns up in earths atmosphere?
When a meteoroid passes through Earth's atmosphere it's traveling very fast. The friction of the air makes gets the surface so hot it begins to burn or glow red hot. This fire is what you see as it goes through the atmosphere. If it burns up completely it's called a meteor.
Do pebbles glow in the dark?
Most rocks and pebbles do not glow.
How does bulb glow?
When current passes through the filaments, they get super hot and give out a glow. Mostly these filaments are made out of tungsten as they cool down fast.
What is the principle of electric bulb in short?
Electricity through a thin wire (filament) makes it glow, which is prevented from burning through the wire by gas inside the bulb.
How do street lights produce light?
They produce light by using mercury vapor :D=======================Answer #2:Some (not many) pass electric current through mercury vapor, causing it to glow violet.Some pass electric current through sodium vapor, causing it to glow yellow.Some pass electric current through a thin wire, causing it to heat and glow ...a process is identical to that in every incandescent light bulb in your house.Some burn natural gas.
What actually gives off light in a light bulb?
Electric current through a filament (thin spiral) of tungsten causes it to heat up enough to glow brightly.
How does a battery make a light bulb glow?
The flow of electrons from the battery flow through the filament in the bulb causing it to get hot and glow thus producing light.
Why does a fused bulb not glow?
A fused bulb does not glow because the filament of a fused bulb is broken. Since current can't flow through the filament, it can't get hot enough to glow.
What does a light bulb have to do with an electrical light source?
A light bulb is a source of electric light. In an incandescent light bulb, the glass bulb forms a protective shield around a glowing filament. The air inside the glass bulb is removed, or replaced with an inert gas. Electric current is passed through a thin metal filament (usually tungsten), which causes it to glow white hot, giving out light. The protective bulb stops the filament from burning up, as it has no Oxygen.
What causes incandescent light bulbs to produce light?
The filament in the bulb has a high resistance to the flow of electricity. As electricity passes through it, the filament heats up and begins to glow, giving off the visible light you see.
Can you use a copper wire to make a filament of an electric bulb?
No, copper wire cannot be used to make the filament of an electric bulb as copper wire has very low resistance. Therefore, the bulb will not glow if current is passed. It would also melt - the filament has to be white-hot to be any use!
Based on what you have seen what must be true for a circuit to light a bulb?
There must be a current through the bulb in order for it to glow.
How do you make a bulb glow with one wire?
This is usually done by passing an electrical current through the wire.
How do you make a bulb which glow on your clapping bulb?
you have to need IC 3 ,bulb
