is electromagnetic induction also used to produce electricity atnlarger scale like for a city or country if yes then how

Yes, electromagnetic induction is used in large scale to produce electricity. In a hydroelectric power station, the flow of water rotates the turbine which again rotates the armature of the generator to produce electrical energy. The generator is an electromagnetic device which contains large number of copper wire turnings in its armature. The rotation of the copper wires in presence of magnetic field produces electricity.