Moving a static electric field

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Discussion Overview

The discussion revolves around the behavior of electric fields generated by current loops, specifically focusing on the effects of physically moving a static electric field versus oscillating it with alternating current (AC). Participants explore the implications of these movements on radiation and energy emission.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • Rjay questions whether a static DC current loop, when physically moved, will radiate energy similarly to an AC current loop.
  • Rjay also asks if a DC current loop rotated at a frequency of 1KHz would radiate in the same manner as a loop with a 1KHz AC sine current.
  • Some participants propose that any movement of charge, whether through electromotive force or physical movement of the circuit, would yield similar radiated results.
  • Another participant asserts that as long as there are fields changing in time and space, there will be radiated energy, although they note that this method may not be very efficient.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between movement and radiation, with some agreeing that movement can lead to radiation while others question the efficiency and nature of this radiation. The discussion remains unresolved regarding the specifics of how different types of movement affect radiation.

Contextual Notes

Participants have not fully explored the assumptions underlying their claims, such as the definitions of static versus dynamic fields and the conditions under which radiation occurs. There is also a lack of consensus on the efficiency of radiation from moving static fields.

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
 

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