Solenoids are a well known application where magnetic fields are used to create controlled magnetic force. Solenoids are used in various industries where they [[wysiwyg_imageupload::]]serve the purpose of hydraulic valves, current limiting switch, steering control of heavy machines etc.   This version of Insight details with DC operated tubular solenoid which is often used as an actuator. Comprising of a metallic can, coil, soft iron cored plunger along with insulator coating and connecting wires, linear solenoids are almost noiseless. Depending upon the movement of the plunger, these solenoids can be divided into push type (where plunger goes inside the metallic can) and pull type (plunger comes out of the tin can). Tubular solenoids can work for longer hours without getting their coil overheated or burnt out.  Let’s find out what more constructional and operational features of one such tubular solenoid in this Insight. 

A transformer is an apparatus for converting electrical power in an ac system at one voltage or current into electrical power at some other voltage or current without the use of rotating parts. Transformers have been an essential component in electrical as well as electronic circuits. Apart from stepping up or stepping down the voltages, they are used for providing isolation, for impedance mismatch and so on. Development of new technologies has reduced the usage of transformers, but still they are quite vital in many applications. 

TransformerStep up transformer increases the magnitude of voltage while step down transformer decrease the magnitude of voltage. Depending on the ratio of the number of turns in the primary & secondary winding a transformer is characterized as step up or step down. is an electrical device used to step up and down the AC voltages. There are two types of transformers: Step up and step down transformer.When a varying current enters in the primary coil of the transformer, it generates a magnetic flux in the core and thus a varying magnetic field in the secondary coil. This varying magnetic field across the secondary coil produces a voltage in secondary coil. This effect is called mutual induction.