Raheem Kolachi Electronic Emission Test is started What is Electron Emission ? Electron Emission:- As we know the valence electrons of the conductor atoms are loosely attached to the atomic nuclei. At room temperature, the thermal energy in the conductor is enough to break the bonds of the last valence electrons and leave them free to any … Read more
What is Transistor ? When a third doped element is added to a crystal diode in such a way that two pn junctions are formed, the resulting device is known as a transistor. The transistor—an entirely new type of electronic device—is capable of achieving amplification of weak signals in a fashion comparable and often superior … Read more
INTRODUCTION TO SEMICONDUCTOR Diode :- Materials such as germanium, silicon, carbon, etc. are not good conductors like copper nor insulators like glass. In other words, the resistivity of these substances lies in between conductors and insulators. Such materials are known as semiconductors. Semiconductors have some useful characteristics and are being extensively used in electronics devices. … Read more
INTRODUCTION OF GAS-FILLED TUBE Gas Tube : In the vacuum tubes, the electrons pass from the cathode to anode in a vacuum. In that type of tubes, extreme care is taken to generate as perfect a vacuum as possible to prevent ionization of gases and the resulting large uncontrolled currents. It may be mentioned here … Read more
What is a Half Wave Rectifier? A half-wave rectifier can be explained as a type of rectifier that only passes one half-cycle of an AC voltage waveform to pass, blocking the remaining half-cycle. Half-wave rectifiers are normally used to convert AC power to DC power, and only require one diode to construct. A simple Half … Read more
Mcqs of Basic Electronics (onilne test) Theory of Basic Electronics What is Electronics ? Electronics: The branch of engineering science which deals with current conduction through a vacuum or gas or semiconductor called *electronics. Electronics essentially deals with electronics devices and their utilization. A device is that during which current flows through a vacuum or … Read more
What Are Active Filters? Active filters are frequency selective circuits that incorporate RC networks and amplifiers with feedback to produce a low-pass, high-pass, bandpass, and bandstop performance. These filters can replace standard passive LC filters in many applications. They offer the following advantages over standard passive LC filters. Gain. Because active filters use amplifiers, they … Read more
Atomic Structure Atomic Structure: According to modern world theory, the matter is electrical in nature. All the materials are composed of very tiny particles called atoms. The atoms are the building bricks of all things in the visible world. An atom composed of a central nucleus of positive charge around which tiny negatively charged particles, … Read more
Atomic Structure Valence Electrons: According to modern world theory, the matter is electrical in nature. All the materials are composed of very tiny particles called atoms. The atoms are the building bricks of all things in the visible world. An atom composed of a central nucleus of positive charge around which tiny negatively charged particles, … Read more
Converters: There are many ways to convert digital codes to proportional analog voltages. However, the most popular methods are the R-2R, string, and weighted current source converters. These are available in integrated-circuit form and are also integrated into other larger systems on a chip (SoC). R-2R Converter The R-2R converter consists of four major sections, … Read more