Electrical4U 
A shunt reactor is defined as a device that absorbs reactive power from a power system to help regulate voltage levels. They are commonly used in high-voltage transmission lines and substations to offset the capacitive effects of long cables and overhead lines. Shunt reactors can be fixed or variable, depending on the needed voltage regulation. … Read more
Secondary emission is a phenomenon where a material emits secondary particles, like electrons or ions, when bombarded by high-energy particles such as electrons, ions, or photons. When the emitted particles are electrons, it is called secondary electron emission. Secondary emission plays a crucial role in devices like photomultiplier tubes, electron multipliers, image intensifiers, and radiation … Read more
What is Alternating Current? An alternating current (AC) is defined as an electric current that changes direction and magnitude periodically. Unlike direct current (DC), which flows in one direction, AC transmits power over long distances with less energy loss. Most household appliances use AC when plugged into a wall socket. The shape of the AC … Read more
A MOSFET, a metal-oxide-semiconductor field-effect transistor, controls current flow with an electric field. Known for their high switching speed, low power consumption, impedance, and efficiency, MOSFETs are essential in electronics and power applications. This article covers common MOSFET applications and their working principles. What is a MOSFET? A MOSFET consists of three terminals: gate, source, … Read more
A servo motor is defined as an electric motor that allows for precise control of angular or linear position, speed, and torque. It consists of a suitable motor coupled to a sensor for position feedback and a controller that regulates the motor’s movement according to a desired setpoint. Servo motors are essential in industries like … Read more
What is a Keyboard Encoder? A keyboard encoder is a device that converts the signals from a keyboard matrix into a serial format data word that can be transmitted to an external device, such as a computer or a microcontroller. A keyboard matrix is a grid of rows and columns of switches that represent the … Read more
A capacitor bank is a group of several capacitors of the same rating that are connected in series or parallel to store electrical energy in an electric power system. Capacitors are devices that can store electric charge by creating an electric field between two metal plates separated by an insulating material. Capacitor banks are used … Read more
A dry type transformer is defined as a transformer that uses air or gas—instead of liquid—as the insulating and cooling medium for its windings and core, all contained within a pressurized sealed tank. Dry type transformers are widely used in various industries and applications because of their safety, reliability, and environmental benefits. They can operate … Read more
A power transformer is a static device that transfers electrical energy from one circuit to another without changing the frequency. It works on the principle of electromagnetic induction and can step up or step down the voltage level of an alternating current (AC) supply. Power transformers are essential for the transmission, distribution, and utilization of … Read more
A diesel power plant is a type of power plant that uses a diesel engine as the prime mover to drive an alternator and generate electricity. Diesel power plants are mainly used for small-scale power generation or as backup sources of electricity in remote areas or during emergencies. In this article, we will discuss the … Read more