|
|
|
|
#1
05-19-2007, 09:55 PM
|
|||
|
|||
do phone chargers use electricity when plugged into wall but not phone
somebody told me that a phone charger that is plugged in uses the same amount of electricity whether or not there's a phone plugged into it. sounds dubious to me. thoughts?
|
|
#2
05-19-2007, 10:02 PM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
Somebody told me that when a tree falls in the forest and no one is around to hear it, it doesn't make any sound on the way down.
|
|
#3
05-19-2007, 10:03 PM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not phone
[ QUOTE ]
somebody told me that a phone charger that is plugged in uses the same amount of electricity whether or not there's a phone plugged into it. sounds dubious to me. thoughts? [/ QUOTE ] That somebody is wrong. The circuit isn't closed, no juice is being drawn.
|
|
#4
05-19-2007, 10:06 PM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
it's true. also all light bulbs use the same amount of energy whether they are on or not. if you're strapped for cash try unscrewing all of your light bulbs when they're not in use.
|
|
#7
05-20-2007, 03:46 AM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
[ QUOTE ]
I saw a king of queens episode about this but I don't remember the verdict, sorry. [/ QUOTE ] It was also on Till Death, I also don't remember the verdict.
|
|
#8
05-20-2007, 03:04 AM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
[ QUOTE ]
[ QUOTE ] somebody told me that a phone charger that is plugged in uses the same amount of electricity whether or not there's a phone plugged into it. sounds dubious to me. thoughts? [/ QUOTE ] That somebody is wrong. The circuit isn't closed, no juice is being drawn. [/ QUOTE ] Nope, this is wrong. Transformers will draw current regardless of whether the direct current side of it is a closed circuit. There is a simple test, put your hand on the charger plug and see if it is warm. If it is then clearly it's using electricity.
|
|
#9
05-20-2007, 03:07 AM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
Yeah with transformers the circuit IS closed. The other side of the transformer circuit is open though.
|
|
#10
05-21-2007, 04:13 PM
|
|||
|
|||
|
Re: do phone chargers use electricity when plugged into wall but not p
[ QUOTE ]
[ QUOTE ] [ QUOTE ] somebody told me that a phone charger that is plugged in uses the same amount of electricity whether or not there's a phone plugged into it. sounds dubious to me. thoughts? [/ QUOTE ] That somebody is wrong. The circuit isn't closed, no juice is being drawn. [/ QUOTE ] Nope, this is wrong. Transformers will draw current regardless of whether the direct current side of it is a closed circuit. There is a simple test, put your hand on the charger plug and see if it is warm. If it is then clearly it's using electricity. [/ QUOTE ] This somewhat correct. A transformer with an open secondary circuit draws very little current. In this case the primary is mostly an inductor. If the primary winding had zero resistance, it would draw no current. Because a real-world primary winding has some resistance, it will draw a very small amount of current. It might add a penny or two to your monthly electric bill. I suppose that if you added up all the cell phone chargers in the world left plugged in when not being used, it would add up to a fairly significant amount of energy, so there is something to be said for unplugging them when not in use, but, seriously, you would probably save more energy in a month by riding the bus once a week, or simply by being careful to turn lights off when you don't need them for a year than in a lifetime of unplugging your cell phone charger when not in use. It is correct that if the charger is warm it is using some electricity.
|
 |
|
|
Hybrid Mode
