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Do electrical appliances continue to use electricity when they aren't switched on?
I have a £60 with my dad if I can prove that electrical appliances don't use electricity when they are plugged in and switched on at the wall but the appliance itself is not switched on. I always leave my phone charger plugged in to the socket with the socket switched on but without the phone attached and my dad thinks that it still uses electricity. I think otherwise and I'd like to get this dispute settled once and for all.
So my question is, If I leave an electrical appliance (eg: a phone charger or a guitar amp) plugged into the wall with the socket switched on, will it continue to use electricity if the appliance itself is not switched on?
9 Answers
- 9 years agoFavorite Answer
Some appliances do continue to use electricity. Anything that responds to a remote control uses electricity because if it didn't have power, how would the electronics be able to detect and respond to the remote? Most things that have an off switch, with a sort of positive mechanical action, do not use electricity when off. Things that need a light press to switch on/off use electricity when off but often very little. Old fashioned chargers do use electricity when the phone is not connected. The modern types use a very small amount. So you are right about the guitar amp. The mobile phone charger comes down to a technicality ... does a very tiny consumption count?
Incidentally for a lot less than60 you canget a tester that shows how much electricity is being used. You may be able to use that to win the bet.
- classicsatLv 79 years ago
Some do, some don't.
Most that do use power when "off", go into a low power state, to power a systemcontroller to wait for commands on a touch keypad or remote receiver.
The guitar amp likely is full off, since the main switch is fully mechanical, and on the mains side. If it is a valve amp, it usually has a Main and a Standby switch. The Main switch turns mains of to the input of the transformer, and Standby turns off the HV-DC to the valves, whilst leaving the filaments lit (if the main is on). A solid state amp will just switch of the mains side. The same with most appliances that have mechanical power switches that have significant throw and takes some force to activate.
The phone charger is always on, but drawing a minimal amount of power when not charging.
- prakdriveLv 59 years ago
Yes it will. The transformer which takes 240V AC down to whatever voltage your device works at will still draw power from the wall socket regardless of whether or not the device is switched on. How much power depends on the construction of the power supply unit. In the case of your phone charger it will use a few Watt-hours per day; it's not much but over the course of a year it mounts up on the bill. The power gets wasted as heat.
I'm afraid you owe your dad sixty pounds. He's perfectly correct.
Source(s): Qualified Electronic Engineer http://ianlangelectronic.webeden.co.uk/#/certifica... - 5 years ago
It relies on the applying. Television,VCR,DVD,Cable bins, computer systems, cell cellphone chargers, chargers of any form , all have alot of stand by means of draw. It is typically digital appliances. Your can opener, or a lamp doesn't one of the gadgets mentioned use virtually as much electricity off as on. They are constructing new instructions as to what's an appropriate amount of stand with the aid of draw. If you wish to see how a lot electrical energy these are utilizing, flip off the whole thing and go seem at your meter. I'll assurance it's turning. Which you can take a studying and yet another reading it 15min, Multiply with the aid of 2,880 and you're going to have KWH used by all of your electronics in stand by way of for a month.
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- Anonymous9 years ago
You are right. If a wall socket is turned on and the appliance turned off then no power can flow. That's why they have on/off switches. Years ago sockets didn't have on/off switches.
If you leave anything on stand-by, then you are wasting uopto £8.00 p.a. for each appliance. Makes sense, you are using electricity fto power the lamp indicator.
Hope you get your £60
- 9 years ago
Stuff like phone chargers will always draw some power, around 3 watts in use, less than half a watt if idle. Anything with an off switch shouldn't take any power, if they do it isn't an off, but standby.
- g1htlLv 49 years ago
Hi
Not sure if what I can tell you will help your bet.
Any item that is left in standby mode i.e TV, HIFI and the like still consumes power albeit at a very low level. Any item with a LCD or LED display also with consume power, any charger, phone/battery charger still consumes power when not connected to the phone/battery but at a very low level.
Regards
John
Source(s): Retired Electrician - 9 years ago
Some appliances convert AC electricity to DC, and then route to ground when not in use, so yes... some appliances do.
Source(s): The Flying Spaghetti Monster - Anonymous9 years ago
it uses some, but less electricity when it is still plugged into the wall