Electrical4U 
A metal halide lamp is a type of high-intensity discharge (HID) lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides. Metal halides are compounds of metals with bromine or iodine. Metal halide lamps have high luminous efficacy, color rendition, and long lifespan. They are widely used … Read more
Hay’s bridge is an AC bridge circuit used to measure the self-inductance of a high-quality factor coil (Q > 10). It modifies Maxwell’s bridge, which measures coils with a medium quality factor (1 < Q < 10). This article covers the construction, theory, phasor diagram, advantages, and disadvantages of Hay’s bridge. What is Self-Inductance? Self-inductance … Read more
A photodiode is a type of semiconductor device that converts light into electric current. It is also known as a photodetector, a light detector, or a photo sensor. Photodiodes are designed to operate in reverse bias conditions, meaning that the voltage applied across them is opposite to the direction of the current flow. Photodiodes are … Read more
A power system is a network of electrical parts that generate, transmit, and distribute electricity. The system operates at a specific frequency, measured in hertz (Hz), which is the number of cycles per second of the alternating current (AC) voltage and current. Common frequencies are 50 Hz and 60 Hz, depending on the region. Why … Read more
An earthing system—often called a grounding system—connects parts of an electric power system to the Earth’s surface for safety and function. The choice of earthing system impacts safety and electromagnetic compatibility. While regulations vary worldwide, most countries adhere to the International Electrotechnical Commission (IEC) standards. This article will detail various earthing systems, their pros and … Read more
Wind energy is a clean and renewable power source that helps reduce greenhouse gas emissions and reliance on fossil fuels. Wind turbines convert wind’s kinetic energy into electrical energy. There are two main types of wind turbines: horizontal axis and vertical axis. What is a Horizontal Axis Wind Turbine? A horizontal axis wind turbine (HAWT) … Read more
What is an Induction Motor? An induction motor is an AC electric motor that operates on the principle of electromagnetic induction. The electric current in the rotor, which produces the torque to rotate the shaft, is induced by the magnetic field of the stator winding. An induction motor does not require any electrical connections to … Read more
A programmable logic device (PLD) is an electronic component that can be configured to perform a specific logic function by the user. Unlike fixed logic devices that have predefined functions, such as logic gates or flip-flops, PLDs can be programmed and reprogrammed to implement different logic circuits. PLDs are widely used in digital systems design, … Read more
A bulb filament is a thin wire that glows when an electric current flows through it. This wire is the key part of an incandescent light bulb, producing light by heating up. Filament materials need special properties to handle high temperatures and provide bright, stable light. This article explores the history, characteristics, and uses of … Read more
A steam distribution system is a vital link between the steam generator and the steam user in any process plant. It carries steam from the central source to the point of use with the right quality, quantity, and pressure. This tutorial will look at the methods of designing, operating, and maintaining an efficient and safe … Read more