It comes from the street, via either an underground cable or an overhead line operating at the voltage that you are supplied with.
Those lines or cables are supplied from a transformer that is probably within about 200 metres of your home. The transformer is supplied at a higher voltage and so on via various high-voltage Transformers back to the grid and from there to the generating stations.
In the UK the local supply works at 240 volts which is also described as 415 v three-phase. The transformer supplies up to 2-300 homes and takes its power at 11 kV three-phase, and that is supplied at 33 kV from a transformer that is capable of supplying a small town of 5000-10,000 people. Towns are connected via a regional grid at 132 kV that connects major substations, and they in turn are supplied from the supergrid at 275 kV or 400 kV, that is 400,000 volts.
Mains electricity can kill by causing cardiac arrest or disrupting the electrical signals in the body that control the heart. High voltage electricity can also cause severe burns and damage to internal organs. Overall, the most common cause of death from mains electricity is cardiac arrest due to the disruption of the heart's electrical system.
It depends what country you're in. Here in the UK, the mains voltage is 230 volts.
In most countries, mains power typically supplies electricity at 120 or 240 volts. The current flowing through mains power can vary depending on the electrical load, but it is typically around 10-15 amps for household circuits.
The source for an electromagnet can be any electrical supply. Batteries or derived from the mains, using a transformed and rectified supply.
The Fair Isle islanders do not use mains electricity because of their remote location and the high cost of connecting to the mainland grid. Instead, they rely on locally generated renewable energy sources like wind turbines and solar panels, along with backup diesel generators for when renewable sources are not sufficient.
my brain
Mains electricity is nothing but main source of power in an installation. From the mains the power is then branched out to different end usage.
Mains electricity is nothing but main source of power in an installation. From the mains the power is then branched out to different end usage.
In English, the "mains" is another word for the electricity supply.
UK mains electricity operates at a nominal voltage of 230 V (+10%/-6%), at 50 Hz.
The mains supply in Scotland is 50Hz.
no
bb
Yes
keyboard can use both
Mains supply provides alternative current while battery provides direct current.
Desktop computers all come with a power supply that changes the mains voltage in your country's electricity supply to that needed inside the PC. Thus the Voltage used by your PC is the mains voltage in the country where the PC was sold.