All countries use electricity to a greater or lesser extent.
Im not really sure, but most countries use it.
China United States Russia
None, unless you count the sun's energy, which is thermonuclear.
No. Lots of countries use 50 hertz for their national electricity services.
Many countries use atomic energy to generate electricity
Many African countries depend on the Nile for Hydro electricity because they need electricity
Tidal power produces electricity, the same electricity that you use in everyday life. Some countries are planning systems that will use the tides as a source of renewable energy. That is an extremely good idea.
It varies in different countries round the world but most use 240 volt mains.
It mainly gets electricity from other countries.
All countries have electricity, to a greater or lesser extent.
To maintain a 'modern society' all countries need electricity.
Electricity is used almost everywhere in advanced countries. Modern life would be impossible without electricity.