The magnetic-fields tag has no wiki summary.
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1answer
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What is the Significance of Magetic Field Energy Density?
If we consider electrostatic field energy density for an electrical field then by analysis we find that it is the representation of the total electrostatic potential energy of the considered ...
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1answer
49 views
Faraday's law question: wire falling over two rails
I'm having trouble with this problem. The picture shows a wire of mass m and length l which slides on two rails, with certain angle with respect to the horizontal.The whole circuit has a resistance R ...
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1answer
36 views
What determines the magnitude of force of an electromagnet?
Let's assume that there is an electromagnet with $B = 1 Tesla$ , what is the magnitude of the force it could generate on other dipoles equal to it's surface area? Can the magnitude of force (in ...
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Calculating the electro magnetic field strength needed to repel a permanent magnet
I have a design where a permanent magnet is placed on top of an electromagnet. When the electromagnet is powered off, the permanent magnet is attracted to the iron core of the electromagnet. When the ...
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0answers
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Explanation for the physics behind magnetic monopoles?
Ok so I am looking for a simple explanation of how the process is done from the information I could access and the knowledge I was allowed I have the idea that it is a matter of quantum physics and ...
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2answers
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Manganese has more unpaired electrons than Iron so why is Iron ferromagnetic Manganese paramagnetic?
Manganese has five unpaired electrons, but Iron has four, then why is Iron ferromagnetic and Manganese paramagnetic?
What's that property I'm missing?
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2answers
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What is the difference between an electric and a magnetic field? [closed]
This question is a consequence of another question of mine which is about spin.
Here is my spin question.
What is the difference between these two fields? How do they occur? Am I right if I say that ...
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1answer
87 views
Magnetic field of a solenoid at the poles?
It's known that at the center of an electromagnet/solenoid the magnetic field $B$ is strongest there. At the pole/edge of the solenoid/ or electromagnet is the magnetic field $B$ strong? Let's assume ...
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Would a $50\: \mathrm{Hz}$ spinning magnetic plate in front of a human generate harmful current?
We know that spinning magnetic plate will generate current inside any wire. so if we stand before 50Hz spinning magnetic plate, then, does that 50Hz spinning magnetic plate in front of us (human body ...
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2answers
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What is the difference between diamagnetism and superconductivity?
Basically, What is the difference diamagnetism and superconductivity?
As far as I understand, diamagnetism comes from the fact, that all electrons in a solid, when exerted by an external magnetic ...
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3answers
90 views
Why doesn't the magnetic field of a coil “cancel out”?
In a coil, we can see that the current moves right, then left, then right, then left, and so on as it travels down the coil.
According to the right-hand grip rule, isn't the magnetic field going in ...
3
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1answer
116 views
What force particle mediates electric fields and magnetic fields?
The force carrier for magnetic fields and electric fields are supposedly photons. I don't get it:
1) Wouldn't that mean that a charged particle (e.g. an electron or even a polarized H2O molecule) ...
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2answers
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why the shape or size of Magnetosphere is different both side?
Two days ago, I watched a documentary about solar flares, and how Magnetosphere protect us from that to earth. I was able to understand most of it, but I'm still curious to know why the ...
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2answers
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Why is B always not 0
I discovered that while applying Ampere's law,
For a solenoid..
B inside is calculated.
But outside we say the loop encloses no net current or hence there should not be any field..
Let's say for ...
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1answer
34 views
Will magnetic field lines change when a magnet gets closer to other magnets?
As many books tells that the magnetic field can be illustrated by a bunch of field lines, which start from one pole and end up at the other. If I have a strong uniform field with field lines along ...
