Electrical and Electronic Components

Component Description Usage
ResistorA resistor is a device which resists the flow of current in a circuit, thus reducing the voltage available to the load.The conventional regulator of a fan is a resistor.
CapacitorA capacitor is a storage device which may be used as a timer, phase splitter etc.All domestic fans have capacitors to split the phase of AC, the starter of a flourescent tubelight is a capacitor.
InductanceAn inductor is a device which resists changes in electric current passing through it. It consists of a conductor such as a wire, usually wound into a coil. Note that an inductor opposes change in current while a resistor just resists the flow of current.The choke of a tube light is an inductor.
TransformerA transformer is a device that transfers electrical energy through electromagnetic induction. Transformers may be used to increase or decrease the alternating voltages in electric power applications.A voltage stabiliser, a mobile charger etc contain a transformer.
DiodeA diode is device that restricts the flow of electric current in only one direction.Diodes are commonly used in rectifiers which are used to convert A.C. (alternating current) to D.C. (direct current)
TransistorA transistor is a device usually made from semi-conductor material used to control the flow of current.Transistors are commonly used as amplifiers and have variety of uses in electronic equipment like radio, tv etc.