All Questions
Tagged with electrical-engineering electromagnetism
69
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How to find the charge gradient of a polarized wire?
How would I find the charge gradient or total charge on either side of the wire, given the application of an electrical field parallel to that wire, provided by, say, a negatively charge plate.
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What are the fundamental limits on the accuracy of a railgun in space?
I can't find anything on the fundamental accuracy limits of the system. I want to know how precisely the projectile coming off the rails can be aimed, probably using a plasma contact armature (because ...
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Electric capacitance of a single block
How would I find the capacitance of a single block of copper?
The dimension of this block is 1 x 1 x 1?
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Mesh Size and Thickness for Faraday Cage?
I've been considering a double faraday cage of 1/4in 23-gauge wire and 1/8in 27-gauge wire. With this setup would the 1/4in on the outer shell and 1/8in on the inner or the 1/8in on the outer shell ...
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High voltage wires
We have bought a house near high tension wires (at a distance of around 20m). Will it be noisy during the rains, and more importantly will the ionization increase the risk of cancer?
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Homopolar motors - a curious realisation
So I've been chasing down devices with unique operational characteristics looking for potential in energy generation and I ran into these things: homopolar motors.
About 9/10 of these things are a ...
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Inductor calculations helper script and motor idea
I have an idea for a motor involving the use of a flyback transformer to recycle EMF in a custom designed pole-to-pole repulsion-attraction DC motor. I wrote a script to help with setting design ...
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How could we aproach development of touchscreen with morphing surface or morphing keyboard?
There is this technology of braille e-readers. It is relatively simple and reliable but it never had much commercial success probably because small customer base.
In past a company called Tactus tried ...
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129
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Would a conical-shaped solenoid be propelled by its interaction with the Earth's magnetic field?
I am wondering if the interaction between the magnetic field created by a conical-shaped solenoid and the Earth's magnetic field will result in this conical-shaped solenoid being propelled through the ...
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Controlled oscillation of a piano string by electromagnetic, mechanical, or other means
What would be a good way to actively control the loudness of an acoustic piano note over time after the note has already been struck by the hammer, such as by actively changing the amplitude of a ...
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Braking system for a miniature ‘Drop tower’ rollercoaster
The tower itself is only max 400mm.
Designing the lifting system isn’t the problem but slowing down the gondola is posing a slight problem, any suggestions?
I have looked into using magnets but I can’...
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What would be the best capacitor to use for a railgun that uses a capacitor as the projectile?
I have had a long-time interest and fascination with railgun technology and for a long time I have wanted to build a small-scale, simple railgun as a scientific experiment. This railgun is designed to ...
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Viability of bladeless wind power generation
I have recently thought of two designs for bladeless wind power generation;
And
They both essentially ionizes the incoming wind which then passes through a coil, the flow of charged wind particles ...
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How does resistivity affect the susceptibility of a steel alloy to induction heating?
For context, my question is related to the use of heating to elongate studs for casing tightening and loosening. In turbine casing assembly, in addition to torquing the nuts, studs have holes drilled ...
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Why are the indices of term of the Cauchy Stress Tensor and Maxwell Stress Tensor opposite to each other?
For CST (https://en.wikipedia.org/wiki/Cauchy_stress_tensor), the first index represents the plane and the second index represents the direction:
For MST (https://en.wikipedia.org/wiki/...
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