The magnetic-fields tag has no wiki summary.
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183 views
Induction cooker + superconductive pot
What will happen if I put a super-conductive object on an induction cooker, and turn the cooker on?
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1answer
109 views
Separation of solids from liquids using magnetic waves
Using magnetic forces, I want to separate solids from liquids in a solution as a centrifuge would do. Is there a way to hit a volume of liquid and get it to separate liquids and solids with heavy ...
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1answer
22 views
Magnetic engine
Is it possible to mimic crrent engine design (to some extent) by replacing the cylinders with opposed magnets? A device interupts their natural desire to push away from each other allowing them to ...
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1answer
83 views
Force of electromagnet on piece of iron
I can find equations to give the force of an electromagnet on a piece of iron when the iron touches the electromagnet.
But what about when the iron is some distance from the electromagnet? ...
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31 views
Magnetic Field versus Line Charge
Isn't a magnetic field basically an electric field originating from a line charge, but as seen in a boosted frame? I mean, that's where the relativistic explanation comes from right?
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Is it possible to measure outside magnetic field from inside a car?
I know that I can detect a vehicle by using magnetic field. I can see obviously difference in signal when a vehicle pass. But I don't see that when measuring in a car.
Is it possible to measure ...
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0answers
78 views
Easy question about magnetism?
I have to build a simple electric motor by attaching a magnet to a battery, extending the terminals of the battery (with stiff wires so they could act as supports), and placing a coil of wire on top ...
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0answers
41 views
What name would you give to the method of approximating an arbitrary magnet with many smaller dipoles?
Let's say I had an arbitrarily shaped permanent magnet, with total magnetic moment $M_{0}$. Ways to calculate the magnetic field of this magnet include an analytic solution (if one exists), as well ...
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21 views
Rosenberg-Coleman effect
I know only that it states some variations of the Sun's magnetic fields. What is the Rosenberg-Coleman effect specifically?
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15 views
Row of pivoted magnets and energy scale
This question is about a system involving a horizontal row of length L of equally spaced pivotable magnets, each with a pole at either end. These magnets will often be referred to as units.
So each ...
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26 views
Cause a change in the magnetic field detectable by a smartphone Magnetometer
I hope someone can shed some light or point me in the right direction.
I have a smartphone that has a Magnetometer built into it. I'm exploring some ideas
of how I might be able to use it. I want to ...
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0answers
83 views
Equation of motion of charged particle under effect of magnetic field
A charged particle with specific charge q/m diverges from the origin [to the first quadrant] by angle X with x axis and with velocity v. To bring the particle back to the x axis, a magnetic field B is ...
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Is a Magnetostatic Approximation Appropriate for a Coilgun Application?
I have little experience with magnetodynamics. Any help would be greatly appreciated.
I have an overdamped RLC circuit as the firing mechanism of a coilgun. A small cylinder of iron (a nail or ...
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49 views
Calculating attracting magnets?
I have two identical bar magnets...
Each bar magnet can lift an object with 10lb of force.
When they attract each other, I believe that each magnet applies a force of 10lb to attract the other.
That ...
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0answers
42 views
Effect of strength of magnetic field on the height of a levitating superconductor?
Quantum levitation, flux pinning -- basically, when a superconductor floats above a permanent magnet, is really fascinating. But does the strength of the magnetic field influence the superconductor's ...
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0answers
108 views
Why are magnetic lines of force invisible?
We can very well feel the magnetic field around a magnet, but we can't see it. Why is that so?
Also, can we cut a portion of the field and use it?
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0answers
75 views
Is there an equation for the magnetic field of a conductor attached to a magnet?
Let's say I have a hollow conductive rod, 10mm diameter (O.D.), and I place a magnet of known strength 50mm up the shaft. What is the microTesla (mT) or Gauss (G) of the magnetic field (or flux ...
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61 views
Would an aluminum cup placed around the back and sides of a disc magnet increase the field strength at the front?
I have read that certain materials, specifically ones with distinct magnetic properties, can influence the way magnetic field behaves around a magnet.
If you were to place a disc magnet inside an ...
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69 views
Changing the charging properties of an inductive charging coil
I am attempting to modify an existing inductive charging coil (Palm Touchstone) so that it outputs the correct magnetic flux for a different wireless charging standard (Qi). I am doing this as an ...
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88 views
Angle of Inclination
How do I calculate the angle of Inclination for a specific location on the Earth? The only Information I've got is the longitude and latitude in degree, so I do not understand. I now ...
