The term “resistance” refers to the opposition to current flow in a DC circuit, whereas the term “impedance” refers to the opposition to current flow in an AC circuit, measured in Ohms. Impedance is a combination of AC resistance and reactance, which effectively reduces the current flow. Phasor Representation in AC Circuits To represent complex […]
Calculating Inductance and Inductive Reactance
An inductive coil generates a self-induced electromotive force (emf) opposing the initial emf in response to an AC supply. This phenomenon, termed inductive reactance, imposes limitations on the flow of time-varying current in the circuit. Inductors and Energy Storage Inductors, also known as chokes, are coils wound around air or ferromagnetic material to enhance their […]
Calculating Phase Shift and Phase Difference
In this post we comprehensively discuss how to calculate and solve phase shift and phase difference in AC sinusoidal waveforms, using appropriate formulas. What are Phasors? Phasors analyze AC circuit behavior when frequencies are the same. Combining phasors depends on their relative phase. Sinusoidal waveforms reach max values at π/2 and 3π/2, and zero values […]
How to Calculate Sinusoidal Waveforms
In this post we comprehensively discuss sinusoidal waveforms and learn how to calculate the involved specifications and parameters. What are Sinusoidal Waves? Basically, sinusoidal waveforms are periodic waveforms whose shape can be plotted using the sine or cosine function of trigonometry. We commonly refer to electrical circuits supplied by sinusoidal waveforms as “AC” voltages and […]
Calculating Phasors and Complex Numbers
Now let us try to understand this whole thing from very beginning. We are dealing with AC circuits, right? And in AC, we always have these sinusoidal waveforms that keep changing their magnitude and direction with time. Then to represent both the magnitude and the phase angle of these sinusoidal waveforms, we use something called […]
Calculating Phasor Diagrams and Phasor Algebra?
So in AC systems, we can show the relationship between voltage and current using something called a phasor diagram. This is like a graphical tool to explain how voltage and current are connected with respect to their phase. To make this diagram, we use a reference phasor and a coordinate axis. Now even if the […]