Except for various types of batteries it is not stored. Commercial Power is available on demand from the National Grid, as is domestic.
The secret government has many hiding spots underground. They have many cities that are currently underground.
The usage of transformer is to produce electricity from a main electric unit
There is no easy way to store electricity. capacitors can store a charge but for commercial usage totally unsound. The way that man learnt o store electricity is by building dams and storing water. So when watter is released energy that energy can be converted to electricity.
Kilo watt hours
Measuring electricity usage.
A television that has been set into stand by mode will still use some electricity. The electricity usage is much less than if the television was fully on but more than if it was off.
The usage is measured by gas and electricity meters. A gas meter measures the volume of gas passing through. An electricity meter is an energy meter which measures the kilowatt-hours use.
The peak hours of electricity usage during the summer and winter are between 12-4pm. Winter usage overnight tends to be higher than in the summer. Programmable thermostats are a great help to reducing electric usage.
Ammeter
No. Your magnet will fight the electricity.
The electricity comes from the battery that have been charged prior to usage, also if hit has a plug that goes in the wall, its taking electricity from the electricity you buy.
There are a few stores that one can purchase Commercial Electric products. Some of the stores are physical stores such as Home Depot, or online stores such as Amazon.