what does an electric ciruit mean Distinguish b+w open and closed electric circuits

An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.
a) Open circuit means the wires are cut off so there will be no current will flow. But there is voltage.
b) Closed circuit means the wires are connected so there will be flow of current. But there is no voltage