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Why do light filament bulbs usually blow when they are first switched on?
Wiki User
∙ 15y ago
because when they are first switched on a large surge of electrical current flow through a cold filament. When you first switch on the bulb the resistance is small, so you get a current surge which breaks the weakened filament. The filament is weakened by repeated heating and cooling from the bulb being turned on and off; which makes it brittle.
Wiki User
∙ 15y ago
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Which element is used in light bulbs as the filament?
Generally, tungsten.
What causes a light bulb to turn black when they burn out?
As an incandescent light bulb is used, tungsten slowly evaporates from the filament causing it to get thinner. When it gets too thin it can no longer carry the current and part of it melts causing the bulb to blow out.
How do light bulbs generate?
They light up from the piece of wire in the middle of the light bulb. Joseph Swan invented the first light bulb. Not Thomas Edison <<>> Light bulbs do not generate they are classified as a load. Generators generate power by utilizing the magnetic flux of coils in the rotor, cutting coils of wire that are located around the generator's stator.
What type of wire is used in a light bulb?
A light bulb glows because of a very fine wire inside the glass bulb called a 'filament'. When an electrical current is put through the filament, assuming the voltage is high enough, it will begin to heat up and glow because such a small wire cannot handle the flow of electrons and has to discharge them through heat and light. Also if you put to much voltage in it will heat up the filament too much and melt it. Incandescent (filament) light bulbs fail over time because they slowly lose small amounts of wire until the filament breaks and stops glowing.
Why is a light bulbs filament long and thin?
The first thing you have to look at for this is the equation for resistance in an object which is R = rho(L/A) where rho is a constant and L is length and A is cross sectional area. Given this equation it should seem that a filament has a high resistance and should not be bright, but the reason it is bright is because it is so small the electrons are packed together so closely that when you send a current through the filament the electrons hit each other at such a high rate that the energy transferred from these impacts is emitted in the form of bright light.
What did early light bulbs have inside them?
the first one was carbon filament
Which element is used in light bulbs as the filament?
Generally, tungsten.
How hot does a filament lamp get?
Bulb filament can reach temperature from 3410 degrees Celsius to 6300 degrees Celsius. No it can't. I think you're totally mistaken about how hot a filament can get. First of all, the temperature of a filament can't go above it's melting point. Secondly, I read that Tantulum Hafnium Carbide has the highest melting point of any known substance at 4215 degrees C. Besides, bulbs have a tungsten filament which has a melting point of 3422 C. It's slightly possible that for some bulbs, they mix tungsten with something else to raise the melting point but since nothing has a higher melting point than Tantulum Hafnium Carbide, the filament can't possibly get hotter than 4215 C by being 6300 C.
What is the difference between a 1156 bulb and 7506 bulb?
The 1156 bulb has one filament in it, which means it only lights on or off. The 7506 on the other hand, has two filaments. The first filament is usually lit up when the headlights or auxiliary lights turn on, and alike the 1156 bulbs (they are usually used for taillights) they light up when they get the second side with voltage sent through them. Hope this helps!
True or false a three way light bulb has 3 filaments?
False. They contain two filaments which are first switched on independently of one another (the lowest two settings), then switched on simultaneously to produce the highest setting. For instance a bulb containing a 25 watt filament and a 50 watt filament will produce 25, 50 and 75 watts of light.
What improvements were gradually added to Thomas Edison's original light bulb?
in 1911 tungsten was introduced as a filament. In 1913 filaments were coiled for the first time, and bulbs were filled with inert gas. Beginning in 1925, bulbs were frosted on the inside
Element used in light bulb filament?
That depends on the bulb, and the time frame. The first bulbs had carbon filaments. Certain bulbs used in control devices have iridium filaments. Modern grocery store incandescent bulbs have tungsten filaments.Tungsten, because of its very high melting point.
What causes a light bulb to turn black when they burn out?
As an incandescent light bulb is used, tungsten slowly evaporates from the filament causing it to get thinner. When it gets too thin it can no longer carry the current and part of it melts causing the bulb to blow out.
What causes the turn signal fuse to keep blowing on a 2004 Honda Element?
It might be that one of the dual filament light bulbs in the system have had the 2 filaments short out with each other. Usually this also causes problems with the stop signals,and turn signals also. I had this happen on a car a long time ago,after I had already replaced the switch. Always check the bulbs first.
What if your 95 Lincoln Continental rear lights don't come on when front lights are on the come on only when you step on the brakes?
It would either be a bad wire in the circuit from the brake light switch on the brake pedal to the bulbs, OR the bulbs have 2 filaments in them and the one that comes on when you apply the brakes are worn out, OR someone put the wrong bulbs in(single filament). I would change the 2 bulbs first.
Why does Jeep Grand Cherokee right blinker blink fast?
My first gues would be that you've used a bulb with the wrong wattage. There are some dual-filament bulbs that can be inserted the wrong way.
Which car parts usually fail first?
In my experience, the battery fails first.
