Questions tagged [electric-fields]
For questions that utilize the concept of electric fields (commonly denoted by the letter E), or for questions whose answers likely involve electric fields. More specific than the [electricity] tag, as questions about the phenomenon & theory of electricity do not necessarily involve the discussion of fields.
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Electromagnetsm, isospin, spin-1/2, and the early years of quantum mechanics question
An electron going around in a circular orbit produces a magnetic field because there is a varying electric field.
But the electric field of the electron itself is a spherically symmetrical field.
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Electric field lines properties
I wanted to ask a question. My question is that are the properties of field lines ( number of field lines leaving/entering a point charge is proportional to the charge, field strength between points ...
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About electrostatic pressure in a charged conductor
To calculate electrostatic pressure, force on an area of the conductor is required. So we calculate the electric field due to charges other than those on the small area on the conductor. Consider a ...
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How does earthing a plate of an isolated charged capacitor even work?
If one plate of an isolated charged parallel plate capacitor is earthed, then that plate must have a potential zero after being earthed as that is what earthing an isolated conductor does, but ...
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What's the difference between electrical induction and chemical batteries [closed]
I'm new in physics/chemistry and i'd like to know what's the difference between both of them and how do they affect the electromagnetic field and move electrons. Also I'd like to know how does a ...
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Understanding dielectrics on the basis of induced charge and energy density
Simply, why is the energy density in a dielectric medium = $\frac{1}{2} K \epsilon_o E^2$?
For a simple case such as that of a capacitor with a dielectric medium inside it, to find the magnitude of ...
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Can field effect transistor s channel s varying depletion layers generate electric flux and control output current indirectly
Since magnetic field lines without need of contact attracts iron filing and drag them closer so that magnetic field line remain smallest.same analogy applied to field effect transistor ions in the ...
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Electric field experienced by a charge
We have two charges, say $Q_1$ and $Q_2$.
The magnitude of the electric field $E$ experienced by charge $Q_2$ is:
$$E = \frac{k Q_1}{r^2}$$
where $k$ is Coulomb's constant and $r$ is the distance ...
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Electric field at a point due to dielectric inserted in between a parallel plate capacitor [closed]
Here, I have a parallel plate capacitor with each plate having surface charge density $\sigma$. A dielectric of dielectric constant $K$, is inserted partially between the two plates. What would be the ...
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Charged plasma and ion grid in interaction in ion thrusters
I was just wondering .....
In this Image of an ion thruster, when the positively charged particles pass through the grids, wouldn't they just bombard the negatively charged grid(a fraction of them). ...
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Electric field inside current carrying conductor
Is the electric field inside current carrying conductor changing electric field or it is a constant electric field?
And how this electric field produce magnetic field?
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Thermionic emission
I have a pretty basic question regarding the beam of electrons as a result of thermionic emission.
In an electron gun, the emitted electrons from the cathode become incident at a point on the other ...
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Electric field at a general point for a finite line charge [closed]
I am trying to evaluate the electric field at a general point (not only just along an axis) for a finite length of charge. I am getting a very weird integral and also my attempt failed the sanity ...
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Understanding Symmetries and Invariances in Electrostatic Fields [closed]
I'm currently studying electrostatics and I'm having trouble understanding the concepts of symmetries and invariances of electrostatic fields. I understand the basic definitions of symmetry planes and ...
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Why are fields described as force divided by mass or charge?
I have read that application of force on a body from a distance, like gravitational or electrostatic force is a two-step process, first, the field is created by the body, then, the application of ...
