The kind of magic without which all of this wouldn't be possible. This tag should be used for questions about the **physics** of the fields that charged particles create and how these fields interact. It should not be used for all questions involving electromagnetism, that would be everything on ...
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1answer
245 views
Differences between a planar coil and coplanar waveguide to create a local 1D AC magnetic field
Coplanar waveguides (for example picture look here) are often used in research to create a local in-plane magnetic field. Now if compared to a planar microcoil like this,
driven by a AC voltage in ...
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votes
1answer
182 views
Calculating what frequencies a dielectric can be considered perfect
I have a problem that is likely going to be on my E&M final this semester that my classmates and I can not figure out how to solve. The question is
At what frequencies can Earth be considered ...
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0answers
51 views
How do construct a electrical resistance tomography apparatus
Im interested in constructing an electrical resistive tomography setup to image underground structures. While I somewhat understand the principle, I have found limited information on design and ...
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0answers
68 views
How can I find the stored energy in a 2d triangle that has a different electric potential at each point?
I am writing a FEM solver for a project. I need to calculate the total energy stored in my mesh so that I can compute the capacitance of the solution.
So obviously I have to loop through all the ...
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0answers
106 views
Salient Pole Machine Inductances
While dealing with a salient pole machine, the stator-rotor inductances get modified through the addition of an extra term which is multiplied with the cosine of twice the electrical angle of ...
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0answers
69 views
Reversing polarity for electromagnets
I'm fairly new to electronics - software engineer by trade. I get the basic parts, but have no experience with circuit design or such.
I picked up a neat WWII era wind speed and direction gauge set ...
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0answers
51 views
Electromagnet duty cycle
I have a project where I would like to use an electromagnet to lift an item for a longer period of time. I was looking at a magnet like this one:
...
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0answers
32 views
Electrical Displacement Transducers
Please can you clarify for me what responsivity, maximum range and
linear range mean in relation to an electrical displacement transducer?
edit: I know now that responsivity is just output/input ...
