Magnet field Definition and 26 Threads

Hello everyone, I'm currently working on simulating magnetic shielding. The shielding enclosure is a rectangular steel box placed in a homogeneous DC magnetic field of 100 mT in air. The steel box has a wall thickness of 3 mm on every side. The inside is filled with air. Here’s the issue...

I realize that the standard formula for the inductance of a solenoid (L = (μ₀ * N² * A) / l, where A is the cross sectional area, N is the number of turns and l is the length) is for solenoids with only one layer of wire. I thought I could find μ₀ using this simple formula, but it does not work...

Whether I actually let a gamma-ray burst hit the solar system in my sci-fi story or not, at least the looming threat of this event will shape the plot in major ways. Therefore, I need to accurately predict the effects of such an event on not only Earth itself, but also the rest of the solar...

For example if I know the total field strength of 1 magnet and I have another magnet exactly the same. When they interact I.e they become attracted to each other and I allow one to move towards the other, the one that is moving does it have double it's own feild strength acting on it ? Or is it...

Hello, How does a vacuum effect the distance a d intensity of a magnetic field ? I've look elsewhere but found conflicting information.

"Method Non-Contact Visualization of Magnetic Fields of Magnets and Magnetized Materials in a Scanning Electron Microscope and the Effect of Anomalous Anisotropy of Electron Trajectories in Magnetic Fields" The preprint of the article is here:

TL;DR Summary: Need help with figuring out how (or even if I can) to calculate the magnetic field field strength for this non-uniform magnetic field. I need help calculating the magnetic field strength (if it's possible) in the space between these two solenoids. It is for my year 12 depth...

As shown in the diagram, a copper conductor is placed over two stretched copper wires whose ends are connected to a D.C. supply. What should be the magnetic poles at points A and B lying on either side of the conductor to experience the force in the upward direction?-------------------- My...

But I don't really know how I am supposed to find the energy difference from the graph, how can I know which peaks to use?

Magnetic field lines are loops, so at the surface of a magnet (axially magnetized) cylinder) pole they look like this? there is a dead zone at the center where there is no lines/magnetic field present? or perhaps they look more like this? lines converge in the middle to a single line or point...

Hello, Assuming that we have a single-phase electrical transmission line (short distance (< 50 km), stranded, non-isolated, made of aluminum conductor steel reinforced), I would like to know the resulting magnetic field (shape, structure, absolute value, and all other possible details) when...

As a project, I am demonstrating electromagnetic induction by making an AC generator. The magnets I currently have access to are very strong neodymimium countersunk magnets, but I noticed that they utilise a Halbach array. I am aware that this means the magnet has alternating N-S poles spaced...

I want to improve the magnetic field strength at the surface of a magnet configuration by utilizing diamagnetic materials to guide the magnetic field lines. I have not the proper equipment to measure the effect myself but would this work? This is the initial configuration with four magnets side...

Einstein famously said “{Thermodynamics} is the only physical theory of universal content, which I am convinced, that within the framework of applicability of its basic concepts will never be overthrown.” I don't think any of us want to argue with Einstein, but it's worth noting the "within the...

Basically, I need to generate the strongest possible field at 10 cm from a circular magnet, in its central axis. I hesitate about what buying. For example, the following magnet has a large diameter of 90mm and is flat, with a suction of 250 kg. This other magnet has a smaller diameter of...

Hello everone, I have recently come across the need of a strong constant magnetic field while being limited in space. The field needs to be unidirectional and up until now was generated by two magnets (12x12x12mm N48). Then I came across Halbach arrays and their potentially stronger magnetic...

I've learned that moving charges produce magnetic fields which in turn affect other charges in motion. After seeing explanations that point to special relativity, I am kind of confused. Can **ALL** magnetic fields be accounted as some kind of electric field from a particular reference frame...

I can't understand intuitively why the authors of the book expressed the cross product between the vectors dl and r (unit vector) as: dl sin(pi/2 - theta); isn't it supposed to be expressed as: dl sin(theta)?? So why did the authors put that pi/2 into the argument of sin function, that's my...

I'm not so sure how to begin with this problem. I was thinking of usign superposition. I think that the field on the conductor due to the parallel segments of the coil is zero, since Ampere's Law tells us that the field outside the solenoid is zero, right? For the perpendicular segments, I used...

Summary: Can such magnetosphere exist on Earth? The moon has mini magnetospheres produced from its crust shown below. Can Earth have similar magnetic properties in its crust like the surface on the Moon to create a mini-magnetosphere? Are ther places on Earth where a mini magnetosphere exist...

for a infinite length length of current, only consider a part of it, is the direction of magnet field of a ring on the mid vertical plane the same magnitude and along the tangential direction? and for a closed surface , if the flux is 0?

It's a random thought I had. Let's say you have a single perfect permanent magnet. There is just one magnetic domain, and the magnet is cut so that its magnetic moment is along a single crystal axis. For example, we can imagine a cube shaped magnet, with the magnetic moment pointing straight...

A moving magnetic field will produce current in a wire. The Earth's magnet field goes beyond the moon. Does that mean bases on the moon could somehow get free energy from a coil setup as it's effectively perpetually moving through Earth's magnetic field?

Homework Statement Attached file shows the problem statement. The Attempt at a Solution I can do this problem easily. Problem is that there's just one step in my book's derivation that I don't understand. It sets ρ equal to the hypotenuse in the triangle and then says that: dl = ρ/sinθ...

If a magnetised neodymium ball has a definite north and south point, could you slice the ball in two, and weld 2 "north" halves together, to create an entirely north ball? If this is impossible, how about designing a ball made in, say, a 3D printer, then embed it with small magnetised neodymium...