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Review - Like poles or Opposite Poles?
Opposite Poles
F) Magnetic Force on moving charges
A charge is shot through
a magnetic field
experiences a magnetic force.
What is moving this beam of electrons?
St. Mary's H.S. Physics YouTube Channel
Television Tube
Physics 2000
Electron in Magnetic Field
St. Mary's H.S.
PrinciplesofElectricityElectronDeflection.mov
Scientific Advisors: Dr. Saul Dushman; Dr. Roman
Smoluchowski;
Dr. David Harker
Prelinger
Archives
Production Company:
Wolff (Raphael G.) Studios, Inc.
Audio/Visual:
sound, color
Creative Commons license:
Public Domain
St. Mary's Physics YouTube Channel
| Moving charges create their own magnetic field |
Force on a moving charge in a magnetic field is maximum when ...
a) .... the charge is Fast or Slow?
Fast
b) Big Charge or Small Charge?
Big
c) ... magnetic field strong or Weak?
Strong
1. Fmag = Bqv
B - flux density of magnetic field (strength)
q - charge (C)
v - velocity (m/s)
Magnetic force is maximum
when charge moves
perpendicular to
field
(Charge shot up)
Magnetic force = 0
when charge moves
...
... parallel to field
2. Direction of magnetic F on a charge moving through a magnetic field
Electron in Magnetic Field II
St. Mary's H.S.
Use 3rd Left Hand Rule
1) Draw in flux lines
2) Thumb - direction of moving
charge
3) 4 fingers - direction of
magnetic Field
4) Palm - direction of force on charge
Answer: Into or Out of the page?
Out of Page
Into page
Figure 2:
Into or Out of page?
Into Page
Left Hand Rule Game
St. Mary's H.S.
Helmholtz Coil
Mapping the direction of the Electromagnet
Finding the mass of an electron - Helmholtz Coil
Enrichment
Neodymium magnet/TV
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