electric circuits

the electric circuits contains some important parts and the electric circuits can't work without it , the first part is the voltage source , this part is the main part , and it give the electric circuits the voltage , the 2nd part is the resistances and this the part which we want to use it contain any machine we want to use it , and all of thing which work by electric current , as lamp for example , the 3rd part is the conductors and it mean the wires , and 4th part is the key , by this part we can switch the electric circuits on or off .