The image did not load. This basically shows two electrodes separated by a layered dielectric. The upper dielectric is ##h_1## thick with a permitivity of ##\epsilon_1##. The electric field in this material is ##E_1##. Similar for the lower material with the subscript of 2.
Could someone point...
I have been looking into the forces exerted by electrostatic fields and have come up with different answers using two different methods. I would appreciate any help in pointing to a reference that will reconcile this or point to an error in my methods. To keep things simple I am using a one...
In switching power supplies the kickback from the magnetizing inductance is generally clamped by the load. The kickback I am referring to will be the sum of the primary leakage inductance and the secondary leakage inductance as modified by the transformer turns ratio.
The effects of leakage inductance depend on several factors. The largest one is the frequency of the signals passing through the transformer structure. For power transformers, which dominately operate with low frequency sine waves, regulation is definitely an issue.
EMI is less important due...
I will try for a more full explanation and show the analysis. As you expeceted the interface between the dielectrics is in the x-y plane. z=0 at all points on the interface. There is no conductor at the interface. For the image charges I have used a simplified version of the methods found in T...
Does anyone have a formula and derivation of the force between two charges in the presence of two dielectric media. Specifically, have the two dielectric media separated by a plane at z = 0. I have a developed a solution using image charges to matched the boundary conditions at the dielectric...
I think that I have this pulled together now using some of the suggestions above. I have redone the analysis using the potential and kinetic energies of both the rocket body and the ejected mass. The result is that the sum of these energies equals the energy supplied by the rocket engine. Energy...
A.T. - This is the reference frame I am using.
jbriggs444 - Work is force times distance. I think I miss-interpreted your question. If the potential energy is decreasing, as in the descending rocket, the work is negative. For the hovering rocket the potential energy goes down due to mass being...
jbriggs444 - in all three cases the thrust is in a direction to drive the rocket upward just enough to counter gravity. I think that this means that the sign of the work is identical. The descending rocket is coasting downward.
A.T. - I assumed that the speed of the ejected mass relative to the...
I have a question concerning gravitation potential energy and rockets under an unusual situation. Let a rocket be in a gravity well of a massive object such as a planet. For simplicity, assume that the rocket is in a vacuum. (we can add air effects later). The rocket engine thrust is dynamically...
Hi,
I'm Jerry, a 74 year old retired engineer. Although my degree is in electrical engineering my approach to problems has generally been from the applied physics standpoint. I have recently become interested in space flight methods. Lots of Newtonian physics there! I ran across this forum when...