Faraday’s law and voltage generation

AI Thread Summary
A conductor moving through a magnetic field generates an electromotive force (emf), leading to the question of whether a highly conductive liquid like seawater could similarly generate emf when moving through a magnetic field. While the principle is sound, practical applications for generating useful energy from this phenomenon have not yet been realized. Magnetohydrodynamic (MHD) drives, which utilize magnetic fields for propulsion without moving parts, represent a related concept but have not been widely implemented. Some existing technologies, such as electromagnetic speed logs for vessels, demonstrate the principle in measuring flow rates. Overall, while the theory is established, practical applications remain limited.
JimH59
Messages
1
Reaction score
1
If a conductor moving through a magnetic field generates an emf, which it does, COULD a highly conductive liquid (eg: sea water) moving through said field (like a magnetic flowmeter measuring flow rate is used) generate and would it be enough to be useful?
 
Physics news on Phys.org
There is a different, but closely related situation (magnetohydrodynamic drive or MHD accelerator), where magnetic fields are used to propel ships with no moving parts:
Screen Shot 2022-04-20 at 9.12.24 AM.png


Screen Shot 2022-04-20 at 9.17.01 AM.png

Some one who knows more about this stuff could give a better explanation of this than I could.

The Russian sub in "The Hunt for Red October" was supposed to be powered by something like a magneto-drive.
Screen Shot 2022-04-20 at 9.21.49 AM.png
 
Reply
  • Like
Likes berkeman and JimH59
Thread 'Question about pressure of a liquid'

Thread 'Question about pressure of a liquid'

I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
View full post »

Thread 'Why is the 3 body problem unsolvable? And what will happen if someone solves it?'

I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
View full post »

Thread 'Time of flight measurement uncertainty'

Hello! I am generating electrons from a 3D gaussian source. The electrons all have the same energy, but the direction is isotropic. The electron source is in between 2 plates that act as a capacitor, and one of them acts as a time of flight (tof) detector. I know the voltage on the plates very well, and I want to extract the center of the gaussian distribution (in one direction only), by measuring the tof of many electrons. So the uncertainty on the position is given by the tof uncertainty...
View full post »

Similar threads

I Pushing a rod in a magnetic field
Replies
15
Views
2K
A Advice for 100 MHz resonator
Replies
10
Views
159
A Bernoulli, lift and cause & effect
Replies
30
Views
4K
I Energy Flow From Battery to the Light Bulb
Replies
16
Views
4K
I Does Ohm's Law work for Light Bulbs?
2
Replies
57
Views
11K
A Question About Induction: Faraday's Law versus Motional EMF
Replies
17
Views
2K
I Charge movement relative to magnetic field frame dependence/invariance
Replies
5
Views
843
B How do you calculate induced EMF in an open loop with changing magnetic field?
Replies
4
Views
3K
Faraday disc voltage increase
Replies
3
Views
1K
B Why does accelerating a loop through a constant magnetic field induce an EMF?
Replies
9
Views
2K

Hot Threads

Recent Insights

Back
Top