Moving a static electric field

AI Thread Summary
A static electric field generated by a DC current loop does not radiate unless it is oscillated, as seen in AC currents. When a DC current loop is physically moved, it can still radiate energy due to changes in the electric field over time and space. The discussion suggests that moving the charge or the circuit itself yields similar radiated results, regardless of whether the current is AC or DC. However, the efficiency of radiation from a moving static field is considered low. Overall, any changes in the electric field can lead to radiated energy, confirming the principles of electromagnetism.
Rjay7800
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Hi Gang,

I have a basic understanding of electricity and magnetism but I am unclear on something. I will be quite general here so please read through my poorly worded questions and try to see what I am really trying to understand.

Assumptions:
An active current loop with DC current emits a static electric field.
When this field is electrically oscillated ie. AC, it can radiate further, hence radio.

So, what happens when a static DC current loop is physically moved? Will it radiate?

If there is a 1KHz AC sine current in the loop, will it radiate the same as if this same loop had a DC current and was rotated at 1KHz?

Can you transmit electric fields by physically moving a static electric field in a loop?

I asked this in several ways, I know. Tell me what you guys think, and why?

I appreciate the help,

- Rjay
 
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Aw, cmon! 24 looks and no answers? Surely, one of you bright Physicists can answer this. (Yes, I know, don't call me Shirley) :-)

I consulted a physicist at work today and they thought that it didn't matter how you moved the charge, whether by electromotive force or simply moving the circuit...you would have the same radiated result.

Anyone dispute?

Questions?, Comments?...Snide remarks?
 
Yes, whatever the cause, as long as you have fields which change in time and space then you will have some radiated energy. It is not very efficient to do it that way but in principle it would radiate.
 
Thank you DaleSpam!
Best Regards,
Rjay
 
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
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