August 2021

Filter Circuits

Filter Circuits   Generally, a rectifier is required to produce pure d.c. supply for using at various places in the electronic circuits. How...

ripple factor formula

Ripple Factor   The output of a rectifier consists of a d.c. component and as a.c. component (also known as ripple). The a.c. component is u...

Semiconductor Diode

Semiconductor Diode   A pn junction is known as a semi-conductor or *crystal diode. The outstanding property of a crystal diode to conduct c...

Properties of pn Junction

Properties of pn Junction   At the instant of pn-junction formation, the free electrons near the junctions near the junction in the n region...

what is pn junction

pn Junction   When a p-type semiconductor is suitably joined to n-type semiconductor, the contact surface is called pn junction. Most semico...

n type semiconductor definition

n type semiconductor definition   n-type Semiconductor When a small amount of pentavalent impurity is added to a pure semiconductor, it is k...

Intrinsic semiconductor and Extrinsic semiconductor

Intrinsic semiconductor and Extrinsic semiconductor   Intrinsic Semiconductor A semiconductor in an extremely pure form is known as an intri...

City Life

City life-its nature-rich people's liking to live in city-poor people also come-city dwellers enjoy living here-many problems-comforts f...

A Classroom

A Classroom   What is a classroom? W here is your classroom? What is the size of your classroom? How many pieces of furniture are there? How...

A Village Market Paragraph

A village market is an important place to the villagers. It is a marketplace in a village, where the villagers go to buy and sell various th...

basics of semiconductor

Basics of semiconductor   It is not easy to define a semiconductor if we want to take into account all its physical characteristics. However...

About Silicon

Silicon   During the infancy of electronic industry, both germanium and silicon were used in the manufacture of semiconductor devices. As th...

Energy Bands

Energy Bands   In case of a single isolated atom, the electrons in any orbit possess definite energy. However, an atom in a solid is greatly...

Bohr’s Atomic Model

Bohr’s Atomic Model   Bohr’s Atomic Model-In 1913, Neils Bohr, Danish Physicist gave clear explanation of atomic structure. According to Boh...

Gas-Filled Tube

Gas-Filled Tube     A gas-filled tube is essentially a vacuum tube having a small amount of some inert gas at low pressure. The gas pressure...

Photo Electric Emission

Photo Electric Emission   Electron emission from a metallic surface by the application of light is known as photo electric emission. When a ...

Field Emission & Secondary Emission

Field Emission   The process of electron emission by the application of strong electric field at the surface of a metal is known as field em...

Thermionic Emission

Thermionic Emission   The process of electron emission from a metal surface by supplying thermal energy to it is known as thermionic emissio...

Types of Electron Emission

Types of Electron Emission   The electron emission from the surface of a metal is possible only if sufficient additional energy (equal to th...