Electrical4U 
The force acting on a unit positive charge inside an electric field is termed as electric field strength or electric field intensity. Electric field strength or electric field intensity is the synonym of electric field. Electric field strength can be determined by Coulomb’s law. According to this law, the force ‘F’ between two point charges … Read more
What is a Y Parameter? Y parameters (also known as admittance parameters or short-circuit parameters) are properties used in electrical engineering to describe the electrical behavior of linear electrical networks. These Y-parameters are used in Y-matrixes (admittance matrixes) to calculate the incoming and outgoing voltages and currents of a network. Y-parameters are also known as … Read more
Whenever we connect an uncharged or partly charged capacitor with a voltage source whos voltage is more than the voltage of the capacitor (in case of partly charged capacitor) it recieves charge from the source and the voltage across the capacitor rises exponentially until it becomes equal and opposite to voltage of the source. Let … Read more
What is Two Port Network? A two port network is an electrical network model with one pair of input terminals and one pair of output terminals. It is commonly used to model the voltage and current characteristics of complex electrical networks. The figure below shows a two port network. A single phase transformer is an … Read more
Overhead lines use wooden, concrete, steel, and rail poles. The choice of pole depends on factors like load importance, location, cost, and maintenance. For low voltage lines, single poles are typically used for all phases. The main types of poles in the electrical system are: Wooden Electric Pole In the past, wooden poles were widely … Read more
As an introduction, we need to know about power state stability. It is really the capability of the system to return to its steady state condition after subjected to certain disturbances. We can now consider a synchronous generator to understand the power system stability. The generator is in synchronism with the other system connected to … Read more
It can be of three (3) types of electric cable faults found. They are Multiple types of faults can occur simultaneously in a cable. The primary cause of the 1st and 2nd fault is due to damage of insulation caused by water, moisture or other reason. Due to the defect in the armour, plumbing or … Read more
What is Electric Heating? Heating is needed for both industrial and domestic purposes. In industries, it’s used for melting metals, molding glass, enameling copper, baking insulators, and welding. At home, heating is used for cooking, water heating, room heating, and pressing clothes. All those purposes of heating can be fulfilled by electricity. Electric heating has … Read more
A switch creates an open circuit (infinite resistance) when in the ‘OFF’ position and a short circuit (zero resistance) when in the ‘ON’ position. Similarly, in a bipolar junction transistor, controlling the base-emitter current can make the emitter-collector resistance nearly infinite or nearly zero. In a transistor characteristic, there are three regions. They are In … Read more
Field Effect Transistors (FETs) are used as Analog Switches The application of FETs as the switches in analog circuits is a direct consequence of their mode of working. This is because when the Gate-Source voltage, VGS is zero, n-channel FET will operate in saturation region and will act like (almost) a short circuit. Thus the … Read more