You buy power by the watt-hour. It has zero to do with the voltage!
no its desame depending on wattage of loads
There aren't any houses in the UK on 110 volts. The UK standard is 230 volts.
If you are referring to domestic electrical outlets, most regions use either 110 - 120 volts or 230 - 240 volts.
They transform most usually voltage or current. Your phone charger is a transformer that transforms 230/110 Volts into probably 5 Volts to charge your phone.
Most commonly is a transformer used to reduce the voltage. You can get it in the shop with electronic eq.
The answer to the Related Question shown below is relevant to this question.
110 deg C = 230 deg F.110 deg C = 230 deg F.110 deg C = 230 deg F.110 deg C = 230 deg F.
the volts are 230
230 Volts
No. Unfortunately every country has different electrical standards. In North America the electrical standard is of 110-120 volts at a frequency of 60 Hz
230 volts
It's an outlet wired for dryers, stoves and some large heaters. In about 50% of the world 230 Volts is the standard household supply used for all appliances. In the other half of the world it is 110 Volts.