2007-12-13 07:27:29 · 10 answers · asked by pyromaniac2617 2 in Science & Mathematics ➔ Alternative ➔ Other - Alternative
Temperature cycling a tungsten filament causes more mechanical stress than leaving it hot or cold.
2007-12-13 07:34:58 · answer #1 · answered by forhirepen 4 · 2⤊ 0⤋
It has to do with what is called in rust or start up current. When you start an electrical device it will try reach it's full current state as fast as possible. The in rush current is higher then running current. This higher current stresses the components of the circuit or in this case the filament. Because the current is so high for just a split second it will vaporize and boiling off a small amount of the filament. The more you start something like a bulb the faster it fails. They make a current limiter device for bulbs that work well.
See---http://www.acehardware.com/sm-the-button-light-bulb-saver-the-button-light-bulb-saver--pi-1379643.html
2007-12-13 14:07:24 · answer #2 · answered by John S 5 · 3⤊ 0⤋
I don't know...but lately my tv &vcr/dvd will go off. It did it about 3 different times. Then, when I turn it back on it works. My elec. clock is on the same plug but it doesn't go off(or it would be flashing).So I don't see how it could be my fuses.
edit..I think I put this answer(which is more of a question) on the wrong question. I meant to put it on the one that had fuses going out.
2007-12-14 15:05:33 · answer #3 · answered by Deenie 6 · 0⤊ 0⤋
yes a bit u can say. cos every time u switch it on ,the filament has to get heated and it takes fraction of a sec to do that. so each time u on off bulb there is heatin and coolin effect. though it wont count much as bulb has part vacumm and an inert gas
2007-12-13 07:35:19 · answer #4 · answered by amey n 1 · 2⤊ 0⤋
Yes it does reduce the life of a bulb. By using a dimmer you can increase the life of a bulb by up to 30%.
2007-12-14 17:26:09 · answer #5 · answered by Kimberlee Ann 5 · 0⤊ 0⤋
It must because if you never turn it on, it's longevity will be indefinite!
2007-12-17 04:29:17 · answer #6 · answered by FOZ 4 · 0⤊ 0⤋
On and off causes expansion and contraction of its metal parts, weakening them.
2007-12-13 07:35:14 · answer #7 · answered by Anonymous · 2⤊ 0⤋
turning it on causes the filament to burn. burning can last for only so long before it is gone. at that point, it is burnt out.
2007-12-13 07:38:06 · answer #8 · answered by Special K 4 · 2⤊ 1⤋
Electrical surge causes wear and tear.
2007-12-13 09:31:25 · answer #9 · answered by Peter D 7 · 2⤊ 1⤋
I'd like to de-bunk the idea this is paranormal.However I'm not qualified,so maybe it's ghosts or darkness loving telekinetics.
2007-12-13 08:00:17 · answer #10 · answered by Dr. NG 7 · 1⤊ 3⤋