Electronic Devices

 BATTERY :- A  battery  is a power source consisting of one or more electrochemical cells with external connections for powering electrical devices such as flashlights, mobile phones, and electric cars. When a  battery  is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode. TRANSFORMER :- A  transformer  is a  passive component  that transfers electrical energy from one electrical circuit to another circuit, or multiple  circuits . A varying current in any one coil of the transformer produces a varying  magnetic flux  in the transformer's core, which induces a varying  electromotive force  across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits.  Faraday's law of induction , discovered in 1831, describes the induced voltage effect in any coil...