How Does High-Frequency Ultrasound Affect Electromagnetic Fields?

AI Thread Summary
High-frequency ultrasound, particularly in the 1GHz range, does not directly affect electromagnetic fields, as ultrasound is a mechanical wave and does not oscillate magnetic fields. However, if a conductive wire carrying electrical current is subjected to ultrasound, the movement of the wire can alter the magnetic field's position without changing its frequency. High-frequency AC currents can produce oscillating magnetic fields, but the high self-inductance of electromagnets limits the current and, consequently, the magnetic field strength unless tuned with capacitors. The discussion also raises skepticism about the generation of ultrasound at frequencies above 100kHz, questioning the feasibility of such high-frequency ultrasound applications. Overall, the interaction between ultrasound and electromagnetic fields is complex and dependent on specific conditions.
RedPhase
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What impact will a extremely high frequency of ultrasound have on a electromagnet?
Will the magnetic field also oscillate at that frequency?

What about a conductive wire transmitting electrical current? Will ultrasound on the wire cause the magnetic field to oscillate?
 
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The ultrasonic wave is just a mechanical effect, so it won't affect a magnetic field directly.

But if the wire moves, it takes its magnetic field with it, so the magnetic field may move closer or further away from a given point, so it might change the observed magnetic field at that point.
 
RedPhase said:
What impact will a extremely high frequency of ultrasound have on a electromagnet?
Will the magnetic field also oscillate at that frequency?

What about a conductive wire transmitting electrical current? Will ultrasound on the wire cause the magnetic field to oscillate?

By "ultrasound" do you mean Actual Sound or a high frequency AC Electric Current?
Sound will have no direct effect but high frequency (any frequency of) AC produces an oscillating field.* The problem will be that an electromagnet will have a high Self Inductance and that will limit the actual value of the current, which will severely limit the value of Magnetic field obtainable - unless you can tune out the inductance with an appropriate Capacitor. This is an added complication.
*The basis of a radio transmitting antenna.
 
Yes.

Ultrasound in the 1GHz+ range(not RF) that vibrates the magnetic field of a transformer core.
 
RedPhase said:
Yes.

Ultrasound in the 1GHz+ range(not RF) that vibrates the magnetic field of a transformer core.

are you really really sure ??

I haven't heard of ultrasound at anything over ~ 100kHz let alone 1MHz 100MHz or higher

what is supposed to be generating this ultrasound?

Dave
 
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