Electron movement in a stationary magnetic field

Click For Summary

Discussion Overview

The discussion revolves around the behavior of electrons in the presence of a stationary magnetic field, particularly in the context of a spark gap setup involving a neodymium magnet and a high voltage source. Participants explore the interaction between the magnetic field and the movement of electrons, as well as the implications for building a magnetically quenched spark gap for a Tesla coil apparatus.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant questions which pole of the magnet an electron would be attracted to when a spark jumps from a pin to the magnet, expressing confusion over the behavior of electrons in magnetic fields.
  • Another participant explains that the force on a charged particle is determined by the equation F = qv x B, noting that electrons, being negatively charged, would move opposite to the direction of a positive charge according to the right-hand rule.
  • A different participant asserts that electrons are not attracted to one end of the magnet and that their path will bend perpendicular to the magnetic field lines.
  • One participant acknowledges the previous point about the bending of the electron beam and adds that realigning the magnet could lead to different conditions affecting the spark gap.
  • A participant shares their past experience with a similar setup, describing how the spark would jump to the magnet's face and mentioning the historical context of magnetically quenched spark gaps as developed by Nikola Tesla.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of electrons in a magnetic field, with some asserting that electrons do not have a preferred pole while others discuss the implications of magnetic field orientation. The discussion remains unresolved regarding the specifics of electron movement in this context.

Contextual Notes

Participants reference the right-hand rule and the behavior of charged particles in magnetic fields, but there is uncertainty regarding the exact conditions under which the spark jumps and the influence of the magnetic field on the electron's path. The discussion does not clarify the assumptions or definitions used in these explanations.

toppentech
Messages
2
Reaction score
0
howdy : I'm new to this site and i have not used a forum before so this is probably going to be stupid . if so ---sorry . anyway if i have a metal magnet (ie neodymium) connected to the positive of a high voltage source and a metal pin connected to the negative of the high voltage source with it being arranged so that a spark will jump from the pin to the magnet ------ which end of the magnet should it jump toward . in otherwords is the electron that is jumping the spark gap more attrected toward the north or south pole of the magnet .
all i see in most explanations is that an electron can be manipulated by a magnetic field BUT it never says which polarity of the magnet "pushes" and which "pulls" . i am trying to build a simple magnetically quenched spark gap for a tesla type coil apparatus . thanks for putting up with us simple folks mike
 
Physics news on Phys.org
an electron can be manipulated by a magnetic field

diagrams of magnetic field lines here:

http://en.wikipedia.org/wiki/Magnetic_field


The force on a particle is given by F = qv x B where F,v, and B are vectors...

By convention, the magnetic field exits the magnetic from the north and re-enters at the south pole..
A positive particle therefore moves according to the right hand rule...and

an electron would be a -q, so it would move opposite...in either case a charged particle
moves othogonally to the magnetic field lines...not in alignment with them...not a good vechicle for a 'switch'...
 
Last edited:
The electrons are not attracted to one end of the magnet. The beam will bend perpendicular to the magnetic field of the magnet.
 
#3 is to the point... I forgot to add that to my post...but realigning the magnet will cause
different conditions as I detailed...
 
thanks for your reply . in the past i have had the above described situation , and the spark (from negative terminal) would jump to the magnet . the mag was 2 x 2 x 1 thick (magnetized thru thickness) . the spark would jump , on a curve, way over to the face of the magnet , but i at the time , wasn't smart enough to write it down somewhere which pole the spark preferred . the switch i was mentioning earlier is a magnetically quenched spark gap , which was invented/patented by nicoli tesla in the early 1900s . the idea is that there is a spark gap with a huge mag field perpendicular to it . when a spark is started across the gap it "rides" ionized air which is extinguished by the mag field as it pulls the spark apart toward opposite mag poles . ----as i understand it --- thanks mike
 

Similar threads

  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 42 ·
2
Replies
42
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 18 ·
Replies
18
Views
5K
  • · Replies 9 ·
Replies
9
Views
2K