In early 1821, Thomas Seebeck searched experimentally for a relation between electricity and heat. He joined two wires of two dissimilar metals to form a circuit. He discovered that if one junction is heated to a high temperature, and the other junction remained at ...Read More

Potentiometer:Working ,Application?

A potentiometer is a null type resistance network device for measuring potential differences.For the accurate measurement of potential difference, current and resistance the potentiometer is one of the most useful instruments. Its principle of action is that an unknown emf or P.D. is measured ...Read More

What is an insulator?

What is an insulator? It is a material which cannot conduct electrical current. It have high resistivity and low conductivity. Atom of the ins have tightly bound electron and therefore cannot move throughout of material. Due to the electrons are static and not freely ...Read More

What is Skin effect?

What is Skin effect?The distribution of current over the cross section of the conductor is uniform in DC only. In alternating current flow through a conductor does not distribute uniformly but it will concentrate near the surface of the conductor. In fact, in AC ...Read More

What is Conductor?

What is Conductor?Conductor is one of the important item is in a Transmission and distribution system of electric power. The cost of the conductor material accounts for a major part of the total cost .So proper choice of conductive material and size of the ...Read More

What is Schottky Diode?

 What is Schottky diode?It is a type of  diode that has less forward voltage drop than the P-N junction diode and can be used in high-speed switching applications. In Schottky diode ,p-type semiconductor is replace by metals such as aluminum or platinum. The  schottky ...Read More

What is Coulomb’s Law?

What is Coulomb’s Law?Coulomb law was firstly published by Charles  Augustin de Coulomb in 1785.The  apparatus used in finding coulomb law is known as Torsion Balance .By the use of Torsion Balance we can accurately measure the  force and distance between the two charges. ...Read More