Electrical4U 
As the name implies, synchronous motors rotate at synchronous speed. The main advantage of these motors is their efficiency—they operate on a three-phase AC supply, and when a DC supply is given to the rotor at synchronous speed, power loss is minimal. Although synchronous motors are designed to operate at specific speeds, drives are crucial. … Read more
To understand armature windings in a DC generator, we first need to understand pole pitch, coils, and coil span. What is Pole Pitch? Pole pitch is defined as the peripheral distance between the center of two adjacent poles in a DC machine. This distance is measured in terms of armature slots or armature conductors that … Read more
LASER The acronym LASER stands for Light amplification by stimulated emission of radiation. A laser is a device that produces a unique type of light not found naturally. This light is generated through optical amplification, which relies on the stimulated emission of electromagnetic radiation. It is different from conventional light in three ways. First, the … Read more
Quantum numbers are like the addresses of electrons in an atom. They indicate the location, energy level, and spin of each electron, helping to define the electron configuration. There are four types of quantum numbers: Principal Quantum Number (n) The principal quantum number represents the main energy level, shell, or orbit an electron occupies. It … Read more
What is a Strain Gauge A strain gauge is a resistor used to measure strain on an object. When an external force is applied on an object, due to which there is a deformation occurs in the shape of the object. This deformation in the shape is both compressive or tensile is called strain, and … Read more
Flexible AC Transmission Systems (FACTS) – What and why? FACTS is the acronym for “Flexible AC Transmission Systems” and refers to a group of resources used to overcome certain limitations in the static and dynamic transmission capacity of electrical networks. The IEEE defines FACTS as alternating current transmission systems incorporating power-electronics based and other static … Read more
What is an Ohmmeter? An ohmmeter (also known as an ohm meter) is an instrument that measures the electrical resistance of a material (resistance is a measure of the opposition to the flow of electric current). Micro-ohmmeters (micro ohmmeter or microhmmeter) and Milliohmmeters make low resistance measurements, while Megohmmeters (a trademarked device by Megger) measure … Read more
Normally, an oscilloscope is an important tool in an electrical field which is used to display the graph of an electrical signal as it varies with respect to time. But some of the scopes have additional features apart from their fundamental use. Many oscilloscopes have the measurement tool that help us to measure waveform characteristics … Read more
Oscilloscopes, like multimeter, are essential tools for understanding circuits. However, they have limitations. To use an oscilloscope effectively, it’s crucial to know these limitations and find ways to address them.A key feature of an oscilloscope is its bandwidth. Bandwidth determines how fast it can sample analog signals. What is bandwidth? Many think it’s the maximum … Read more
A bridge circuit is an electrical circuit configuration used to measure unknown values of resistance, impedance, induction, and capacitance. Many types, like the Wheatstone bridge, Maxwell Bridge, and Kelvin Bridge, work on the same principle and measure quantities accurately. Here is a brief description of how some of these bridges function: Wheatstone Bridge A Wheatstone … Read more