i have a couple of suggestions but i will just give one for now. make the field a volume with some transparency , the lines currently alone is hard for learners to appreciate the region of the 3D space where there is magnetic field lines.

wow, U r a Colos member! cool! hope to see more applets from U!

« Last Edit: March 10, 2010, 09:39:49 pm by lookang »

make the field a volume with some transparency , the lines currently alone is hard for learners to appreciate the region of the 3D space where there is magnetic field lines.

I think it is a good idea, I'm working on it, please let me know if you have more comments

from the point of a learner, it will make learning relational when it is possible for the the learner to verify the equation of motion of a charged particle in B field.

F = v^B*q

in the case of a constant velocity and in a circular motion case

F = m*v*v/r

v^B*q = m*v*v/r

B*q = m*v/r

make B, r, m, v measurable helps the learner to understand the equation is really a suitable model to predict the motion.

. The following show a charged particle trapped bwtween two uniform field. You can use sliders to change the width and the separation between two sets of magnet. The magnetic field is assumed to be uniform inside the magnet region. and the field is zero when outside the boundary.

You can change the location and velocity of the charged particle with mouse drag and drop or with sliders.