All Questions
Tagged with voltage maxwell-equations
8
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Maxwell stress tensor on a capacitor late given a dielectric
Given a capacitor with large plates (area $A$) separated by a dielectric with relative permittivity $\varepsilon_r$ and thickness $g$, I believe the Maxwell stress tensor states that the force on each ...
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2
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Definition of voltage for motional EMF
In the schoolbook physics example of a generator, the wire loop rotating in a constant (both in space and time) magnetic field, we can measure a non-zero voltage between the loop's two terminals due ...
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Why can we talk of electric potential under AC?
An electric potential $V$ is defined by the relation $E = - \nabla{V}$. The existence of such a potential is true in electrostatic (constant electro-magnetic field) because of the Maxwell-Faraday ...
- 206
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Current Density in conductor in DC Mode
I was trying to calculate the current density in a conductor subject to DC voltage but I come to an absurdity. I took a circular copper conductor.
Situation scheme
I have considered the Drude Model : $...
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Conceptual Question on Maxwell's 3rd Equation in Integral Form
$$
\oint_C \vec{E} \cdot d \vec{l} = -\frac{d}{dt} \oint_S \vec{B} \cdot d \vec{A}
$$
where $S$ is a surface and $C$ is its boundary.
Why is there no negative sign in front of the left-hand side? I ...
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1
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What is the induced voltage in the configuration of the image?
I have a subtle question regarding induced voltage in a system, where a a rotating rod is electrically connected by a sliding contact with a conductive ring, perpendicular to a homogeneous and ...
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137
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How to draw + and - and $\nabla \times E$ on a circular wire?
Faraday's Law: $$\vec{\nabla}\times\vec{E}=-\frac{\partial\vec{B}}{\partial t}$$
Circulation of electric field:
For time-varying magnetic field and a closed wire, How can we add + and - pole signs ...
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Spherical magnet inside a solenoid
When passing a bar magnet through a long solenoid why is it that the induced emf when the magnet is in the middle of the solenoid is zero? And if a spherical magnet is put inside the solenoid, will ...
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