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ehabmozart
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This is an extract from my book ... " We define the potential V at any point in an electric field as the potential energy per unit charge associate with a test charge q0 at that point: V=U/q0." I don't know why did the book bring the test charge q0 now in the frame. Shouldn't the potential be only by q. To be more specific in my question, V= Kq/r ... What is q, isn't it q which produces the field?? Can someone explain it with referring the analogous theme of force and electric field? To be more specific in my question, in our definition of potential, we said it is U per unit charge. How then U miraculously disappear in our net equation of V which is Kq/r and we can assume now that potential is created by a single charge. Wasn't it actually originated by definition by relating it to another charge. Thanks in advance
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