| Author |
Topic:
Electricity question [Locked] |
Shimatta33  Posts: 142
Registered: 2003-11-19 23:55:28
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
paulg_68 posted:
Suppose I have 2 lights. One is 12 volts / 20 watts. The other is 120 volts / 20 watts.
Both run off of a regular electrical outlet. Obviously the 12/20 one has something internal to the light that converts from 120 volts to 20.
My question is, do they consume the same amount of electricity?
Yes it would consume the same amount of electricity. The 20W rating is its rating for whatever voltage. The outlet power is 120V. So for the second one at 120V the bulb would be using approximately 20W of power. For the first one there would be a step down transformer to bring the voltage down to 12V, where it's rated at 20W. This means it'd also be using approximately 20W of power.
Now, if that step down transformer wasn't present that'd be a whole different story.
-----signature-----
'tis an ill wind that blows no minds...
|
ZartanAround  Title: Torpid Curmudgeon
Posts: 768
Registered: 2004-2-6 20:54:09
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
-----signature-----
what are nice chickens like you doing in a coop like this?
|
Walker_ID Posts: 673
Registered: 2002-5-29 10:20:09
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
paulg_68 posted:
Suppose I have 2 lights. One is 12 volts / 20 watts. The other is 120 volts / 20 watts.
Both run off of a regular electrical outlet. Obviously the 12/20 one has something internal to the light that converts from 120 volts to 20.
My question is, do they consume the same amount of electricity?
there isn't enough info to answer this question
-----signature-----
You can't outrun Darwin
|
IMHO  Title: Official Outpost Greeter
Posts: 2,287
Registered: 2001-11-1 03:55:02
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
Shimatta33 posted:
paulg_68 posted:
Suppose I have 2 lights. One is 12 volts / 20 watts. The other is 120 volts / 20 watts.
Both run off of a regular (120v) electrical outlet. Obviously the 12/20 one has something internal to the light that converts from 120 volts to 20 (circuit).
My question is, do they consume the same amount of electricity?
Yes it would consume the same amount of electricity. The 20W rating is its rating for whatever voltage. The outlet power is 120V. So for the second one at 120V the bulb would be using approximately 20W of power. For the first one there would be a step down transformer to bring the voltage down to 12V, where it's rated at 20W. This means it'd also be using approximately 20W of power.
Now, if that step down transformer wasn't present that'd be a whole different story.
The light bulbs consumes the same amount of electricity, but the circuit for the 12v /20w light bulb with a transformer consumes more electricity than the circuit for the 120v / 20w light bulb with out a transformer.
Other wise you could heat your house for free using only transformers 
-----signature-----
You're Right ~ Koneg
He's [Manegarm] like the Fred Phelps of atheism. ~Bubbledude
many of you are in the Republican boat, aka the ship of fools. ~Modeeb
We are here on Earth to fart around. Don't let anybody tell you any different. ~Kurt Vonnegut
|
Walker_ID Posts: 673
Registered: 2002-5-29 10:20:09
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
IMHO posted:
The light bulbs consumes the same amount of electricity
^^ correct
edit:removed a part that i may be mistaken about
-----signature-----
You can't outrun Darwin
|
NuEM Posts: 1,007
Registered: 2004-3-2 09:08:11
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
Obviously this is a school level question where the transformer's work is ignored.
-----signature-----
|
Koneg Title: Evil Genius
Posts: 894
Registered: 2001-12-4 15:31:28
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
NuEM posted:
Obviously this is a school level question where the transformer's work is ignored.
Of course it's ignored. It's irrelevant.
As mentioned repeatedly already: A watt is a watt is a watt.
If they are both rated as a 20 watt draw then they are both using the same amount of electricity, regardless of the "work" they put that wattage to.
-----signature-----
* First rule of a gun fight: Have a gun.
|
"Any sufficiently advanced idiocy is
indistinguishable from trolling." -- Arthur C Clarke
|
Fat_wong  Posts: 293
Registered: 2007-2-6 07:59:17
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
|
this is like that grade school math equation that was posted here a couple years ago that you morons couldn;t get right
|
Friarspam Posts: 638
Registered: 2007-1-23 07:01:27
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
It depends on if the outlets are D or R!
/FAKE BIRTH CERTIFICATE!
I leik makarowneeandcheez
/ARGULEFFINBARGUL
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
BubbleDude Title: Perma-N00b
Posts: 488
Registered: 2003-2-27 21:04:24
|
Date Posted:
1/1/00 12:00am
Subject:
Electricity question |
/thread
-----signature-----
"It's much easier to just bitch on the internet than actually do something." - Altra_Shadowstalker
It probably came here in the first place because it did a search for "pedo forum." - Yukishiro
|
|
