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Resistance, reactance, and impedance are three basic terms associated with AC circuits. In this article you’ll learn the basic difference between resistance, reactance, and impedance.ResistanceReactanceImpedanceResistance is essentially friction against the motion of electrons. It is present in all conductors to some extent (except superconductors!), most notably in resistors. When alternating current goes through a resistance, a voltage drop isContinue reading “Difference between Resistance, Reactance, and Impedance”

If I needed to describe the distance between two cities, I could provide an answer consisting of a single number in miles, kilometers, or some other unit of linear measurement. However, if I were to describe how to travel from one city to another, I would have to provide more information than just the distanceContinue reading “Basics of Complex Numbers for Electrical Engineers”

The airplanes use aviation fuels that are either petroleum-based fuels or are petroleum and synthetic fuel blends that are used to power the aircraft. Here a question arises: Is it Possible to Design Electric Plane? The simple answer is NO!

Let’ start our article with a Quiz Question. Here we have two AC waveforms and it is desired to convert them to phasor: a), b), c), or d) what’s the correct option. From given options b) is the correct answer. In this article you’ll learn how to represent ac waveform to vectors. How exactly can we representContinue reading “How to Represent Waveforms in form of Phasors”

For AC circuit measurements and calculations things can get very complicated due to the complex nature of alternating current in circuits with inductance and capacitance. However, with simple circuits (figure below) involving nothing more than an AC power source and resistance, the same laws and rules of DC apply simply and directly. In this articleContinue reading “Basic Resistive AC circuit Analysis”

Two or more AC unsynchronised waveforms have their values that don’t match at the same points, this gives an introduction to the definition Phase. In this articleyou’ll learn about AC Phase. Things start to get complicated when we need to relate two or more AC voltages or currents that are out of step with each other.Continue reading “What do you mean by Phase in AC”

One of the more fascinating applications of electricity is in the generation of invisible ripples of energy called radio waves. The limited scope of this lesson on alternating current does not permit full exploration of the concept, some of the basic principles will be covered. With Oersted’s accidental discovery of electromagnetism, it was realized thatContinue reading “Basics of Radio Waves”

band-pass filter is a type of electric filter which allows all signals lying within a band between a lower-frequency limit and an upper-frequency limit while it rejects all other frequencies that are outside that specified band. In this post, you’ll learn the construction and working of different types of Band Pass filters. Also learn Low pass filter & High passContinue reading “Band Pass Filters – Working and types of Band Pass Filters”

Induction motors present a lagging (inductive) power factor to the power line.The power factor in large fully loaded high speed motors can be as favorable as 90% for large high speed motors. At 3/4 full load the largest high speed motor power factor can be 92%. The power factor for small low speed motors canContinue reading “Power Factor of Induction Motor”

The power flow in resistive and reactive ac circuits is one of the most fundamental and important concepts everyone doing Electrical Engineering should stay familiar with. The flow of power in AC circuits forms foundational base for understanding the Power Factor. In this engineerfriend.tech.Blog article you’ll learn the power flow in AC circuits. Consider a circuit forContinue reading “Power Flow in Resistive and Reactive AC circuits”