Electrical4U If you’re looking to learn all about electrical and electronics engineering – you’ve come to the right place. Electrical4U is the ultimate electrical and electronic engineering study site. We are dedicated to the teaching and sharing of all things related to electrical and electronics engineering. We have over 1000 electrical and electronics articles. Learn all … Read more
Single Phase Three Phase Power Rating VA KVA MVA Primary Voltage V KV Secondary Voltage V KV Calculate The ideal transformer equation connects the primary and secondary voltages using: Vs = Vp * Ns / Np where The equation that relates the primary and secondary currents of a transformer is: Is = Ip * Np … Read more
What is an Electrical Resistor? A resistor is a passive component in a circuit which provides resistance to the flow of current. There are many different types of resistors. These resistors vary in their construction, power dissipation capacities, and tolerance to various parameters (such as temperature and light). The types of resistors include: Carbon Composition … Read more
Complex Power It is very conceptual and essential to understand. For establishing the expression of complex power, we have to first consider a single phase network that’s voltage and current can be represented in complex form as V.ejα and I.ejβ. Where α and β are angles that voltage vector and current vector subtend with respect … Read more
A simple voltaic cell is made by placing a zinc plate and a copper plate in a diluted sulfuric acid solution. When the plates are connected through an external load, electric current flows from the copper plate to the zinc plate. This creates an electrical potential difference, making the copper plate positively charged and the … Read more
What is MCB? A Miniature Circuit Breaker (MCB) is an automatically operated electrical switch used to protect low voltage electrical circuits from damage caused by excess current from an overload or short circuit. MCBs are typically rated up to a current up to 125 A, do not have adjustable trip characteristics, and can be thermal … Read more
This is a collection of Electrical Engineering articles. We cover electrical engineering basics, electrical power systems, machines, and electronics.
What is a Low Power Factor Wattmeter? A low power factor meter is an instrument that is used to accurately measure low values of power factor. Before we study more about the low power factor meter, we need to understand why we need a low power factor wattmeter in the first place (as opposed to … Read more
A Bipolar Junction Transistor (BJT) is a three-terminal device. It can function as either an amplifier or a switch, requiring one input circuit and one output circuit. To handle this with only three terminals, one terminal serves as a common connection for both input and output. The choice of the common terminal depends on the … Read more
During purchasing a JFET for a particular application we need to check the specifications of the device. These specifications are provided by manufacturers. The followings are the parameters used to specify a JFET and these are Gate Cut Off Voltage At a fixed drain voltage, the drain current (ID) of a JFET depends on the … Read more