Today I finished off voltage potential. We looked at voltage potential arising from various charge distributions. I gave some clarification concerning the sign on the "work equation". We looked at how to get the electric field from the voltage function. We solved an example problem for a ring of charge and the associated voltage potential along its axis.
You should try to take the voltage we derived for the ring, find its gradient, and see if that answer is the same as the one you found during your PA session.
I was happy to see a few more people volunteering answers in class. Interactivity is welcome in my lectures, and no one should feel shy to speak out!
PS: Here is the solution to the little problem I gave last Friday, courtesy of your classmate Kenneth. The objective was to look at each motion path around a charge, and decide if moving a test charge along that segment would require you to input energy, have the field release energy, or result in no change of potential energy.
You should try to take the voltage we derived for the ring, find its gradient, and see if that answer is the same as the one you found during your PA session.
I was happy to see a few more people volunteering answers in class. Interactivity is welcome in my lectures, and no one should feel shy to speak out!
PS: Here is the solution to the little problem I gave last Friday, courtesy of your classmate Kenneth. The objective was to look at each motion path around a charge, and decide if moving a test charge along that segment would require you to input energy, have the field release energy, or result in no change of potential energy.
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