Didn't live up to its promise, and was overtaken in performance (speed and density) by drams. MB memory was non-volatile, I seem to remember, but that's not such a big issue.
Sylvia.
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19 years ago
magnetic field
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19 years ago
Kevin Kilzer wrote
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19 years ago
--------------- actually- for most lines- except an isolated conductor which doesn't exist, this is not true. The field produced is due to the effects of all current carrying conductors. The resultant, at any point is directional and the horizontal and vertical components are not necessarily a maximum at the same time. Care must be taken with simple meters as they often will not give the whole picture.
---------- Again - insulators do not concentrate the field- they are used in regions of high field and co-ordination of the insulators with the air gaps is important. Also, as with the magnetic field- all sources contribute so a simple visualisation of circular equipotentials and radial lines of flux is simplistic except for the non-existant case of an isolated single conductor.
In any case the original question was with respect to what is a magnetic field. A proper answer to this has been given - it is simply a region where magnetic effects can be seen. Why the effects occur or what is magnetism is not germane to the issue.
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19 years ago
I can give you my point of view:scientists (and applied science) always looks *the use* of certain inventions, and not in-depth-view of what magnetic field is really.So, you have a rotating magnet inside a stator:voila, an alternator. You have a stator that creates a rotating magnetic field and inside it a "squirrel cage" rotor:voila, an asynchronous rotor.Without both the inventions, todays world would not exist. Imagine a refrigerator motor with brushes.Or a fan motor with them.Or generating electricity only with DC.Actually, the equations of Maxwell, describe an electromagnetic field, used to transmit TV and radio, and have nothing to do with pure magnetism (even in the more complex form of the rotating magnetic field).The magnetism...is something.
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