Why does a light bulb blow? how to prevent it?
603423
Electric light is produced by running an electric current through a resistor that then glows white-hot.  Edison searched through thousands of different materials to find one that glows just right.\n\nToday most regular light bulbs use a tungsten filament (a little wire made of the material 'tungsten') which gives off a lot of light but it is relatively breakable.\n\nWhen a bulb 'burns out' it means that this little filament has burned up or broken.  It is more likely to break when it is turned on.  Technically I suppose you could get more life out of a bulb by leaving it on all the time but that would be a waste of energy and you don't want light all the time.\n\nThese days there are other materials and other ways to make light bulbs that last a lot longer but they are not in common usage yet.
474124
either your teacher is nuts or you probably know more about this than us. the bulb has to be a vacuum, and making a glass vacuum requires better equipment than most people have access to.
297433
false, but the rumor probably started I believe one of Edison's bulbs is still burning in Menlo park (his lab).\n\nIt's never been turned off, which helps it last longer.
168586
The light bulb uses radiation which is not as effective as convection in this case.
846799
It takes energy to push that current through your lights and appliances, and that's what your paying for. One way to see it is to consider that what comes out the downstream prong is at 0 volts and therefore of no use to anyone. Or, you could just wire all your lamps in series and see how that works!
592436
In order for a furnace to blow air it needs to have an intake for the air. Air gets filtered at the intake so clean air is passed through the furnace and heated and blown out. Blocking the intake will cause overheating of the furnace. Always make sure filters are clean and nothing is blocking the intake.\n\nI hope this helps
735946
An incandescent bulb usually has a vacuum inside. Sometimes it has argon in it. While it is on, the tungsten in the filament is evaporating from the heat until finally the filament gets so thin that it breaks and the bulb is useless.\n\nA halogen bulb includes a halogen gas in it. While it is on, the tungsten in the filament is evaporating from the very high heat that these bulbs are operating at. However tungsten vapor evaporating from the filament combines with the halogen gas so that the filament is rebuilt when the tungsten lands on it and does not burn through. That lengthens the life of the bulb and the higher temperature also gives a brighter light for the same wattage. More light, more life, less operating cost.
924992
If they expand unevenly, small gaps will develop between them. This will allow air in, which will oxidize the filament, and the life of the filament in the bulb will be shortened.
95756
I'm not sure, but I think what you mean by this question is what kind of solution will conduct electricity.  If you stick the ends of two wires into a solution that would otherwise form a closed circuit with a battery and a lightbulb, what kind of solution would allow that bulb to light?  The answer is that anything that dissociates into charged particles can conduct electricity.  That's any soluble ionic compound such as baking soda or salt and any strong acid or base, like hydrochloric acid.  Things like sugars, which are not made up of ions, will dissolve but will not conduct electricity.  Anything that conducts electricity in solution is called an electrolyte.
975896
Energy is measured in watts, so I assume you mean a voltage source of 200v.\n\n(1)\nThe voltage source of 200v applied to the light bulb (laminar) will be 200v.  Since the light bulb is designed for 130v, the supply voltage will likely blow the bulb.\n\n(2)\nHere you have two possibilities, depending on your circuit.\n(a) If you have a parallel circuit, then each light bulb will have 200v across it, and again the bulbs will likely blow because the voltage is to high.\n(b) If you have a series circuit, the voltage across the light bulbs will be subject to their resistance.  Assuming the resistance is the same, then the voltage will be the same, that is, 100v each.\nThe voltage across each light bulb will be equally proportional to it's resistance ratio.
1186464
I hear that they have trouble with light bulbs. For some reason it takes three of you guys to screw one in.
379474
usually, a light source is set behind a cris-crossing of wire grids which have non-conductive material at the points that they cross each other.  the light then attracts insects such as moths, mosquitoes, etc, which will make the insect more than likely touch two or more of the wires (the grids are small), when they touch two of the wires, their body completes the circuit and the electricity flowing through their body kills them, and the electricity flows until you hear the "POP"!!!  =P  you can probably make one, but definitely might be unsafe, but if you do, good luck!
818868
I suspect this refers to how flourescent light bulbs generate a quasi-continuous spectrum as opposed to the discrete emission lines like other self respecting plasma discharge tubes.  \n\nHere is a website that has several pages on Flourescent Lamps:\n\nhttp://home.howstuffworks.com/fluorescent-lamp.htm\n\nThe first two or three are the ones useful to you.  Also there are several links on the last page under More Great Links that will help you in your researches.  Happy hunting!\n\nBTW: This reeks of an intro science class lab write-up question.  TAs at help desks or profs during office hours can help a great deal more effectively than something like yahoo answers, if you want to truly understand.
528103
The most likely cause would be tensions in the glass during cooling; if the light had just (or recently) been switchd off then glass cooling at different rates can easily cause stress in the bulb which can cause it to explode. \n\n This could be triggered by very cold air in the room, something on the surface of the bulb or just a badly made bulb with for example varying glass thickness which could cause it to cool at different rates.  Cooling at different rates causes an explosion as the glass contracts in different rates and as glass is so brittle this can cause enough stress to crack the glass.\n\nTheatre and TV lights which burn at very high temperatures (typically in excess of 2000K) has to be dipped in alchohol if touched accidentally by human hands.  The oils from your fingers burn at the high temperatures and when the bulb is switched off the soot cools much quicker causeing the bulb to crack/explode.
326683
The incandescent bulb (which hopefully will become ancient paraphenelia in a few years) produces light by heating a tungsten wire white hot. At these temperatures, most materials "re-crystallizes" or moves.  "Hot spots" can develop that eventually lead to the failure of the filament, i.e. it breaks. When they break, they can rattle inside the bulb when you shake it.
215667
check ur connections and see if there are any loose wire or burnt bulbs
174509
Ours don't do it every night, but they do it occationally (like once a week or so). I was told it was because the bulbs tend to accumulate moisture inside them and if you don't heat up the bulbs to reduce the moisture level periodically, when you do turn them on they will all tend to blow out really quickly. So, I guess that means using them makes them last longer.