A PL simple cell, also known as a voltaic cell, is an electrochemical device that converts chemical energy into electrical energy. It consists of two different metal electrodes, usually zinc and copper, immersed in an electrolyte solution such as dilute sulfuric acid. The zinc acts as the anode and undergoes oxidation, releasing electrons, while the copper acts as the cathode and receives electrons. This flow of electrons through an external circuit produces electric current. Simple cells are basic and demonstrate the fundamental principle of electricity generation through chemical reactions.