Electron Gun

Definition: Electron gun is defined as the source of focused and accelerated electron beam. It is a device used in Cathode Ray Tube for displaying the image on the phosphorous screen of CRT. The electron gun emits electrons and forms them into a beam by the help of a heater, cathode, grid, pre-accelerating, accelerating and …

Electron Gun Read More »

Cathode Ray Tube (CRT)

Definition: The CRT is a display screen which produces images in the form of the video signal. It is a type of vacuum tube which displays images when the electron beam through electron guns are strikes on the phosphorescent surface. In other Words, the CRT generates the beams, accelerates it at high velocity and deflect …

Cathode Ray Tube (CRT) Read More »

Different Layouts for Substation

The substation is the part of an electrical supply system which transmits the high voltage from the generating substations to the local distribution networks. Between the generation and distribution, the voltage may vary through several substations. The different types of layout for substation are explained below in details. Typical Radial Substation In the radial substation, …

Different Layouts for Substation Read More »

Difference Between CFL & LED Bulbs

The major difference between the CFL and LED is that in CFL the emission of light is because of the ionisation of mercury vapour. The mercury vapour when ionise produces ultraviolet rays. These rays when collides with phosphorous coating tube generates visible light. Whereas in the LED it is because of the PN junction diode. When …

Difference Between CFL & LED Bulbs Read More »

Zener Diode

Definition: A heavily doped semiconductor diode which is designed to operate in reverse direction is known as the Zener diode. In other words, the diode which is specially designed for optimising the breakdown region is known as the Zener diode. The symbolic representation of Zener diode is shown in the figure below. Zener Diode Circuit …

Zener Diode Read More »

Fabrication of Transistor

Definition: The fabrication of the transistor is the process of creating the transistor that is used in electrical and electronics circuit. It is a photo-lithographic or chemical process of creating the transistor on the wafer of semiconductor material. Mostly silicon is used for the fabrication. But compound semiconductor is also used for the manufacturing of …

Fabrication of Transistor Read More »

Octal Number System

Definition: The number system whose base is 8 is known as the octal number system. The base 8 means the system uses eight digits from 0 to 7. All the eight digits from 0 to 8 have same physical meaning as that of decimal numbers. The next digit in octal number is represented by 10, …

Octal Number System Read More »

PNP Transistor

Definition: The transistor in which one n-type material is doped with two p-type materials such type of transistor is known as PNP transistor. It is a current controlled device. The small amount of base current controlled both the emitter and collector current. The PNP transistor has two crystal diodes connected back to back. The left side …

PNP Transistor Read More »