Multimedia: Electricity and Magnetism

1
Multimedia Electricity and Magnetism
Ivan S Ruddock Department of Physics University
of Strathclyde, Glasgow G4 0NG i.s.ruddock_at_strath
.ac.uk
2
Introduction
Multimedia selected from Proc. 11th European
Workshop on Multimedia in Physics Teaching and
Learning (MPTL XI) Szeged, Hungary, September
2006

• Criteria for selecting these multimedia examples
  from the list
• Topic that cannot be illustrated by conventional
  means obviously 3D such as magnetic effects.
• Ignored those that are intrinsically 2D phenomena
  electrostatics, circuits and circuit components
  etc.
• Ignored commercial adjuncts for textbooks.
• Charge moving in a magnetic field and/or electric
  field (186/217/126)
• Magnetic field inside a solenoid (138)

3
Inspiration Pioneer of using models for teaching
undergraduate physics If I cannot make a model
of it, I cannot understand it Lord Kelvin, 1824
1907 Professor of Natural Philosophy, Glasgow,
1846 99 Sir William Thomson, 1866 Baron Kelvin
of Largs, 1892
William Thomson, 1846 (aged 22)
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Observations

• The best multi-media may come from the least
  expected sources

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University of Strathclyde First year EM
magnetic force
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University of Strathclyde First year EM
magnetic force
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(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
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(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
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(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
10
(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
11
(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
12
(217) Magnetic force F q(v x B) in
2Dhttp//lectureonline.cl.msu.edu/mmp/kap21/cd53
3capp.htm
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(186) Lorentz force F q(E v x B) in
3Dhttp//surendranath.tripod.com/Applets/Electric
ity/MovChgEleMag/MovChgEleMagApplet.html
Surendranath Reddy
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(186) Lorentz force F q(E v x B) in
3Dhttp//surendranath.tripod.com/Applets/Electric
ity/MovChgEleMag/MovChgEleMagApplet.html
15
(186) Lorentz force F q(E v x B) in
3Dhttp//surendranath.tripod.com/Applets/Electric
ity/MovChgEleMag/MovChgEleMagApplet.html
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Observations

• The best multi-media may come from the least
  expected sources
• Dedicated departmental server required in some
  cases as multimedia may be part of a large suite
  of applications
• Many titles available on-line BUT few appear
  to be available for immediate download
• internet access required in the lecture theatre
• Applets cannot easily be imbedded into
  PowerPoint, use LiveWeb
• http//skp.mvps.org/liveweb.htm
• Need to distinguish between
• sophisticated applets of interest to the lecturer
  (186 3D Lorentz force) for use as a teaching
  aid during lectures,
• and simple illustrations that add little to a
  diagram but are suitable for private study by
  students (217 2D Lorentz force or 138 solenoid)

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University of Strathclyde First year EM
magnetic field inside solenoid
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University of Strathclyde First year EM
magnetic field inside solenoid
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(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/w
alkup/demonstrations/WebAssignments/Magnetism001.h
tm
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(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/walkup/d
emonstrations/WebAssignments/Magnetism001.htm
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(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/walkup/
demonstrations/WebAssignments/Magnetism001.htm
Applet accompanied by exercises seeking
observations but there is no explanation of why
the field changes as the number of turns
increases or their spacing changes
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(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/walkup/d
emonstrations/WebAssignments/Magnetism001.htm
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(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/walkup/
demonstrations/WebAssignments/Magnetism001.htm
24
(138) Magnetic field in a solenoid example that
adds little to a basic diagram or a good aid
for private study? http//www.nhn.ou.edu/walkup/
demonstrations/WebAssignments/Magnetism001.htm
25
Observations

• The best multi-media may come from the least
  expected sources
• Dedicated departmental server required in some
  cases as multimedia may be part of a large suite
  of applications
• Many titles available on-line BUT few appear
  to be available for immediate download
• internet access required in the lecture theatre
• Applets cannot easily be imbedded into
  PowerPoint, use LiveWeb
• http//skp.mvps.org/liveweb.htm
• Need to distinguish between
• sophisticated applets of interest to the lecturer
  (186 3D Lorentz force) for use as a teaching
  aid during lectures,
• and simple illustrations that add little to a
  diagram but are suitable for private study by
  students (217 2D Lorentz force or 138 solenoid)
• Also need to check that the physics is correct!