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Questions tagged [electromagnetism]

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162 questions
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1 answer
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I'm currently studying the textbook "Antenna Theory and Design" by Balanis. Specifically I'm going through the chapter on aperture antennas (chapter 12). When analyzing the case of a ...
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2 answers
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May be too elementary.. A permanent magnet, reciprocating in a coil with a large number of turns, when driven by a motor produces an emf by Faraday's Law. Can the emf be inputted again in some way ...
Narasimham's user avatar
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I’m trying to build is a solid thermal storage facility for cold regions, where ambient temperatures can drop to −20 °C. The idea is to store heat at high temperatures (about 400–1000 °C) so it can be ...
laboratory's user avatar
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I'm not an engineer or engineering student, just someone trying to design a low-cost, multi-line refreshable Braille display for a competition. I have no formal engineering training, so I’ve been ...
Zain's user avatar
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1 answer
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This is the introductory picture of the DC motor Wikipedia page (https://en.wikipedia.org/wiki/DC_motor). My state is that this picture is a bit confusing because the rotor coils are not wired in the ...
giubacchio's user avatar
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I'd like to create a roughly 3000G magnetic field inside a cylindrical container and from what I can see a solenoid would probably be the best option. What's the best way to go about creating a field ...
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1 vote
1 answer
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I have an electronic clutch also called an electromagnetic clutch. It is a PTO clutch from a law mower if you're familiar. The clutch is connected to a motor and a spool, the spool reels in a rope ...
Alex Segovia's user avatar
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How are NanoLED and MicroLED computer screens designed differently? The NanoLED trademark seems to indicate that the issue is probably marketing, and not different engineering or materials: I don't ...
George Ntoulos's user avatar
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I need to depress a plunger on a large thick fluid syringe and ideally it would be remote controlled or able to be activated with the pull of a string. The problem is the syringe is modified to fit in ...
Analisa Given's user avatar
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1 answer
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I’ve been reading about activated carbon capacitors (like supercapacitors). They use the huge surface area of porous carbon and ions movement in electrolyte to store energy. But they seem to have some ...
Euler-Maskerony's user avatar
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I am trying to simulate several piezoresistive materials to be used as tactile sensors. A sheet of the material (Like Velostat for example) is to be placed on top of two electrodes, pressure on the ...
adnan's user avatar
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2 votes
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I am reading Oliver Sacks's memoir Uncle Tungsten, The book is remarkably interesting: he was a keen amateur chemist in his youth, and clearly a polymath.I was struck by this: "It was fascinating ...
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Here is what I've thought up so far. As is depicted, there exists a toroidal solenoid wrapping a highly permeable metal, with a current that is equal to $sin^2(\omega t)$. This generates a B field ...
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I'm a student with an innovative idea for gym equipment, specifically adjustable dumbbells. My concept aims to solve space, hygiene, and progression issues in gyms: Instead of multiple sets of fixed-...
odinFlame's user avatar
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Assume an electromagnet is placed on wind turbine tower. Would the yaw motor placed inside the nacelle (and powered off since the wind turbine is not yet fully installed) be affected by the magnetic ...
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