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Old 01-14-2011, 04:16 AM
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What are meant by oscillating electrical and magnetic fields?

Electromagnetic waves can travel through vacumm and does not require a medium.l This is because EM waves are made up of oscillating electrical and magnetic fields. What does oscillating electrical and magnetic fields mean?

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Old 01-14-2011, 07:56 AM
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It must be the flux capacator !!

on an oscillisope with an old points type system you could see the wave. the points close , you "load up" the coil. When the points open the spark happens when the magnetic field collapses, draining the high voltage in the secondary windings.then firing the spark plug.. When This HV secondary magnetic field collapses it then inducing voltage back into the primary windings.this voltage seeks a ground and this next induces voltage into the secondary,back and forth etc, etc. each time the wave gets weaker. the capacator (condensor) must be matched to eliminate burning that would happen if these later sparks jumped and arced thru the points.
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Old 01-14-2011, 08:29 AM
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Quote:
Originally Posted by Fosterlin
Electromagnetic waves can travel through vacumm and does not require a medium.l This is because EM waves are made up of oscillating electrical and magnetic fields. What does oscillating electrical and magnetic fields mean?
The phenomena you're asking about is what causes things as diverse as visible light to microwave radiation.

I do not pretend to be any sort of expert in the field, but perhaps the representation below will demonstrate to you what the oscillating waves are and how they interact:


Electric and magnetic fields oscillate together but perpendicular to each other and the electromagnetic wave moves in a direction perpendicular to both of the fields.

The two (magnetic and electrical waves) are inexorably linked- you basically cannot have one w/o the other.
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Old 01-14-2011, 03:58 PM
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Go to GOOGLE and enter (electromagnetic radiation fields).

vicrod
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Old 01-16-2011, 08:11 AM
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oscillating simple means that its constantly changing. An oscillating magnetic field is one that changes meaning that it goes from weak to strong (typically many times per second).

Moving a magnet past the tip of a screw driver many times you can feel the magnetic field get strong and weak as you go back and forth. Thats an oscillating magnetic field. If the magnetic stays stuck on the screw driver then its no longer oscillating, its a fixed field.

Automotive coils get voltage, which makes the coils become a magnetic. When voltage is removed, the field collapses. This happens many times per second = oscillating magnetic field.
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Old 01-17-2011, 03:18 PM
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cobalt 327 that chart is a work of art. talk about a picture being worth a thousand words.

however you can have one without the other: for example running electric wires thru steel conduit. or just romex, where you have the + canceled out immediately by the -. or, a magnet holding onto something. if the magnetic field isnt moving then no electricity
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