Flow of electrically charged particles through a conducting circuit due to the presence of a potential difference . The current at any point in a circuit is the amount of charge flowing per second; its SI unit is the ampere (coulomb per second). Current carries electrical energy from a power supply, such as an electrical cell (battery), to the components of the circuit, where it is converted into other forms of energy, such as heat, light, or motion. It may be either direct current or alternating current . Heating effect When current flows in a component possessing resistance, electrical energy is converted into heat energy. If the resistance of the component is R ohms and the current through it is I amperes, then the heat energy W (in joules) generated in a time t seconds is given by the formula: W = I 2 Rt . Magnetic effect A magnetic field is created around all conductors that carry a current. When a current-bearing conductor is made into a coil it forms an electromagnet with a…