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Results tagged with electromagnetism
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user 25671
The classical theory of electric and magnetic fields, both in the static and dynamic case. It also covers general questions about magnets, electric attraction/repulsion, etc. Distinct from electrical-engineering.
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How can magnets be used to pick up pieces of metal when the force from a magnetic field does...
I learned that the force from a magnetic field does no work. However I was wondering how magnets can be used to pick up pieces of metal like small paperclips and stuff. I also was wondering how magnet …
- 195
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Why does a vacuum environment almost always accompany thermionic emission?
I have not heard of the work function being pressure dependent. Is it because heat is dissipated too rapidly outside a vacuum and the electrons would interact with teh surrounding gas?
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Magnetic Fields
If you had solenoid or another type of electromagnet that produced its magnetic field from a current carrying like a Helmholtz coil then you could switch the direction of the current to reverse the di …
- 1,319