Question about capacitor and dielectric

AI Thread Summary
The discussion focuses on the forces acting between a capacitor and a dielectric when the dielectric is inserted while maintaining constant voltage and constant charge. It is clarified that the direction of the force remains the same in both scenarios, with the dielectric being pulled into the capacitor. The energy change differs depending on whether the voltage or charge is held constant, but this does not affect the force direction. Understanding these dynamics is crucial for applications involving capacitors and dielectrics. The interaction between the capacitor and dielectric is essential for optimizing performance in electronic components.
alexio
Messages
6
Reaction score
0
The problem is that I am complicated what the direction of the force between capacitor and dielectric is while inserting dielectric in capacitor, when the voltage of capacitor is constant.
Also I want to know the direction of the force, when the charge of the capacitor is constant.
 
Physics news on Phys.org
The dielectric is pulled into the capacitor in each case.
The energy change is different, but not the force.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
Back
Top