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1. Is there a better way to introduce the notion of Electric Field
to beginning students? I understand that the inertia of the test
charge means that it will only start along a field line and not
stay on it but it sure is an appealing approach since they, at this
stage, understand forces fairly well.
2. May I ask the question again, postulating a massless
(inertia-less) test charge? Or, how does one show that the filed
line does come all the way around (at the elementary level of
course)?