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Electricity.
Wiki User
∙ 15y ago
When electricity passes through the wire of a light bulb, the resistance in the wire causes it to heat up through a process called Joule heating. This heating effect causes the wire to reach such high temperatures that it emits light and produces illumination in the bulb.
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How does a light bulb make heat?
The electrical energy input which is meant to turn the lights on is not 100% used (since no machine is 100% efficient.) Most of this energy is wasted as heat energy.If a substance reaches a certain temperature it gives off light and heat. When a filament light bulb reaches that temperature, it gives off both light and heat
What are the values of the speed of light?
the speed of light is 186,000 miles a second it takes the light from the sun takes 7 minuates and 59 seconds to reach earth if the sun explodes it wont be known until the light reaches the earth.
What objects refract light?
Objects that refract light include lenses, prisms, and water droplets. When light passes through these objects, its path is bent or altered due to the change in medium or the different angles of the surfaces.
Is Schurz shown in a positive or negative light How can you tell?
Schurz is shown in a positive light in the story. This is evident through his actions and dialogue, which portray him as a kind, honest, and courageous individual who stands up for what is right and believes in justice and equality for all.
Incorporating new information into existing theories is to as modifying existing theories in light of new information is to?
"Integrating new information into existing theories is to refine existing theories based on new information."
What is the main reason fore a light bulb to stop working?
the main reason for a light bulb to break is, the light bulb heats the tungstin wire. When the tungstin wire gets heated to much it breaks, causing thi light bulb to stop working.
What is filament coil?
it is the coiled wire that heats up and gives off light in a incandescent (ordinary) light bulb.
What are you hearing when you shake a light bulb?
The piece of coiled wire made of Tungsten (Wolfram) that heats up and glows in the lamp.
Will two batteries and a wire make a light bulb light?
first of all, you need a bulb, a wire, and ONE light bulb. You clip the wire on the battery and touch the wire on the bottom of the light bulb
What happens to the bulb when the switch is on. why?
Current begins to flow through the tungsten filament of the wire. Because of its high resistance, the wire heats up till the point that it starts glowing, producing light from the bulb.
How does electricity turn on a light?
When electric current flows through the tiny wire inside the light bulb, the electrical energy heats the wire so hot that it radiates light and heat. If the wire was in air, it would immediately burn up. But all the air has been removed from the light bulb, so the wire lasts for a while even though it's so hot.
How does electricity flow through a light?
A voltage is applied across the terminals of the light fixture to which the bulb is attached by two terminals, hot and neutral. A current then flows through the bulb. In an incandescent light the filament wire heats up and glows.
How does electricity work in light bulbs?
The wiring inside the light bulb is very thin (the filament) and glows when heated. The current through the thin wire heats up the filament wire so that it will glow. See the related link 'How Light Bulbs Work'.
What is the wire that gives off light in a light bulb?
In an incandescent light bulb the wire that gives off the light is called the Filament.
What type of electricity moves along a pathway to turn on a light?
When electric current flows through the tiny wire inside the light bulb, the electrical energy heats the wire so hot that it radiates light and heat. If the wire was in air, it would immediately burn up. But all the air has been removed from the light bulb, so the wire lasts for a while even though it's so hot.
Can a bulb light up if no electricity is running through to it?
Simply put, no. A light bulb lights up because the filament inside (the thin wire that often breaks) has a lot of resistance in it, then when electricity flows through it, it heats up and glows brightly.
What is the resistor inside a light bulb called?
the wire in your light bulb is a resistor :)
