Solid and Semiconductor Devices

1.1 Structure of SolidsAll the things we see around us are mainly exists in three states i.e. solid, liquid and gas. The atoms, ions and molecules of these matters are held together with some force...

Introduction to Semiconductors

Types of Semiconductors

Introduction to Transistor

The name of the transistor is for its transfer resistor action. It has a very important property of amplifying weak signals.It is a semiconductor device made by 2 PN junction diode.Types of Transi...

Nanotechnology

Nanotechnology is the branch of physics that deals with the study of few hundred atoms.Mission of Nanotechnology: To increase the ratio of  surface area to volume.This helps to increase the storage...

P-N junction diode

1.  WHAT IS P-N JUNCTION DIODE?=>  it is a semiconducor that carries current only in one direction.2. HOW IS A P-N JUNCTION FORMED?    => when you attach a p-type and an n-type semiconductor ...

Energy band theory of solids

1. WHAT IS A ENERGY BAND?=> like energy levels, energy bands are also permitted "region" where a electron can exist in a atom or a molecule.  as the name suggests, energy band are much broader p...

Characteristics of NPN Transistor.

TRANSISTORstructurally; (BJT) it is a semiconductor with three layers of alternate dopingfunctionally; it is an electric component that can be used as an electric switch and signal amplifierNPN tra...

Helium-Neon Laser

Types of LaserHe - Neon LaserHe - Ne laser is the gas laser which consists of highly evacuated discharge tube. The tube is filled with He and Ne in the ratio of 5:1 with a pressure of 1mm of Hg i.e...