What exactly is a phasor? - Physics Stack Exchange
2016年9月19日 · A phasor is a complex number, representing a sinusoidal function whose amplitude (A), angular frequency (ω), and initial phase (θ) are time-invariant. Image and text from Phasors Wikipedia Assume you have a network composed of multiple sinusoids (waves).
electromagnetism - Phasor length of current and Voltage in AC
2018年8月12日 · Here is a phasor diagram which I have picked at "random" where the length of the current phasor does not mean much with its direction giving a reference when comparing its phase with the phase of the voltages.
Phasor Notation Convention - Which Projection to Consider?
2020年5月19日 · A phasor is a rotating vector. If, at time t it makes angle $(\omega t + \phi)$ with the x axis, its projection (for a phasor of unit magnitude) on to x axis is, by definition, $\cos(\omega t + \phi)$, and its projection on to y axis is $\sin(\omega t + \phi)$. Which of these we choose to represent a sinusoidal displacement, voltage or whatever ...
Kirchhoff's laws in phasor domain - Physics Stack Exchange
2016年4月20日 · When we turn this time-signal into a phasor, I'm calling that process a phasor transform. 'Time-signals' in the time-domain, with corresponding phasor signals in the phasor-domain. I highly recommend getting a text on Linear Circuits. If you know some calculus you should be able to handle it fine.
homework and exercises - Finding frequency from phasor in EM …
2018年10月12日 · The general form of a phasor discribing a plane wave (spherical, cylindrical or Cartesian) travelling in the direction $\hat n$ is $$ \vec E_p=\vec E_0(x,y,z) e^{-jk\hat n\cdot \vec r} $$ where $\vec E_0(x,y,z)\cdot\hat n=0$. The amplitude need not be constant: in the case of a spherical wave it would go like $1/r$ for $\hat n=\hat r$ for instance
The curl of phasor of electric field - Physics Stack Exchange
2018年1月4日 · Let the phasor electric field of a uniform plane wave be $\vec{E_{0}}e^{-i\vec{k} .\vec{r}}$ where $\vec{k}$ is the wavenumber vector and $\vec{r}$ the position vector.
Description of phasor form of Maxwell's equations in linear media
2022年2月23日 · The phasor representation accounts for this phase shift by the complex form of $\epsilon$ and $\mu$. $\epsilon$ is the complex permittivity of the medium, and $\mu$ is the complex permeability of the medium. I don't understand this part:
Phasor form of Maxwell's Equations - Physics Stack Exchange
I'm interested in the transformation from the standard Maxwell's equations to their phasor equivalents. From the literature, this means injecting: \begin{equation} E = Re(\boldsymbol{E}e^{j\omega t}) \end{equation}
Phasor Diagram of Voltage and Current - Physics Stack Exchange
2016年12月5日 · The analysis of an a.c. circuit is facilitated by the use of phasor diagrams. In an a.c. circuit, voltage and current are represented by phasors i.e. rotating vectors. Now, both voltage and curren...
electric circuits - Need help understanding KVL in Phasor Notation ...
2019年3月28日 · The remanding terms are by definition in phasor notation so I substituted the appropriate variable to show that it is a phasor. Now I don't understand why they removed the real part operator since we can have phasors that add up to having a real part that is zero but have an imaginary component that may be non zero.