I Can Electromagnetic Levitation Make an Entire Apparatus Go Skyward?

  • I
  • Thread starter Thread starter Willb1998
  • Start date Start date
AI Thread Summary
Electromagnetic levitation can be linked to diamagnetism, as demonstrated by the ability to levitate magnets between bismuth plates. However, the entire apparatus, including the base, cannot achieve sustained upward motion due to gravitational forces and the limitations of diamagnetic saturation. Observations of temporary levitation, such as an aluminum cylinder briefly rising, highlight the phenomenon but do not support the feasibility of a fully levitating base. The concept challenges traditional views of stationary bases with levitating objects above. Overall, while intriguing, the idea of a complete levitating apparatus faces significant physical constraints.
Willb1998
Messages
4
Reaction score
1
Hi I'm new I had the idea that possibly diamagnetism, levitation and electromagnetism could be linked for example I know that a magnet can be levitated between 2 pieces of bismuth. I'm not good with math nor electricity but do you think if something being repulsed like a bismuth plate was bolted to a base with all thread over an electromagnet would the whole apparatus go skyward? Most people think of a stationary base and something like a train being levitated above. Just wondering if the whole thing would go upwards or levitate including the base.
 
Physics news on Phys.org
Willb1998 said:
Hi I'm new I had the idea that possibly diamagnetism, levitation and electromagnetism could be linked for example I know that a magnet can be levitated between 2 pieces of bismuth. I'm not good with math nor electricity but do you think if something being repulsed like a bismuth plate was bolted to a base with all thread over an electromagnet would the whole apparatus go skyward? Most people think of a stationary base and something like a train being levitated above. Just wondering if the whole thing would go upwards or levitate including the base.
No. It would levitate up to the point were either a) gravity will win b) the diamagnetic force saturates.
 
pines-demon said:
No. It would levitate up to the point were either a) gravity will win b) the diamagnetic force saturates.
Interesting at 1:16 you can see a large aluminum cylinder hopping upwards and levitating for probably half a second on its way back down.

 
  • Skeptical
Likes weirdoguy and pines-demon
This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'
Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
Back
Top