This post is further extension of previous posts,"Understand The Automic Structure....." and "Different Types of Energy Band........".This post along with

This post is further extension of previous post"Understand The Automic Structure.....".Here you will find the information about energy band of an atom.

In the field of Electronics Engineering,the study of atomic structure is most important in view to understand the conductivity material etc...If you know the

For many applications,we required d.c. supply.Due to an economical proposition,the Electric Power is almost exclusively generated,transmitted and
distributed in the form of Alternating Current.

For the successful operation of all Electron Tubes and Semiconductor Devices d.c. supply is required.Batteries can not be used for the purpose as they are

The Vacuum Tubes will always give satisfactory performance in a Circuit if they are operated under proper condition.Actually this is the basic requirement
of any Electronics Devices or Circuit.We have to take due care about the requirement of such Devices.Any deviation may result in the damage of the Vacuum Tube.The Vacuum Tube Manufacturers publish manuals indicating the limitations in the Operating Conditions.

An Electronic Device,in which the flow of Electrons is through a Vaccum is known as Vaccum Tube.

A Vaccum Tube usually contains a Cathode which is called as Electron Emitter,an Anode which is called as plate (which is electron Collector) and one or

The substance used for Electron Emission is known as an Emitter.An Emitter should have the following Properties.

01)High Melting Point:-

As Electron Emission takes place at very High Temperatures,therefore,the substance used as Emitter should have High Melting Point.

The substance used for Electron Emission is known as Emitter or Cathode.The Cathode is heated in an evacuated space to emit Electrons.

As Cathode is sealed in Vaccum,therefore,the most convenient way to heat it is Electrically.The heating processes may be done by two methods.The

From my previous post,you come to know about "Emission of Electrons".This Electron Emission can be classified in four different types.The details about that
four types are as below.

The External Energy which is used for Emission of Electrons,may come from variety of sources such as Heat Energy,Energy stored in Electric Field,Light

At Room Temperature,the Thermal Energy in the Conductor is adequate to break the bonds of the Valence Electrons and leave them unattached to any one
Nucleus.These Unbound Electrons moves at random within the Conductor and are known as Free Electrons.

The Branch of Engineering which deals with Current Conduction through a Vaccume or Gas or Semiconductor is known as Electronics.

Electronics mainly deals with Electronics Devices and their utilization.Such Devices have valuable properties which enable them to function and behave as

Thermistor is a means of a term "Thermal Resistars".Thermistors are generally made from Semi-Conductor Materials.Most Thermistors have Negative
Coefficient of Temperature Resistance i.e.Their Resistance decrease with increase in Temperature.

A Hygrometer measures the Value of Humidity Directly.Generally,the output of Hygrometer is used to indicate Relative Humidity.

Several Material exhibit changes in Electric Properties that are caused by Humidity.These are frequently used in Transducers that are designed and

The Liquid Levels can be measure by different methods but following two are more important from the subject point of view.

01)Electrical Methods:-
The Direct Conversion to Liquid Level position to Electrical Signal is used in many instances.The measurements is generally done by two conversions,so

In order to overcome some of the diffculties,A.C.Tachometer Generators are used.The Tachometer has Rotating Magnet which may be either Permanent
Magnet or an Electromagnet.The Coil is wound on the Stator and therefore the problems associated with Commutator (as in D.C.Tachometer) are absent.