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kougou
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Homework Statement
I don't understand the follow formula of the integral :Integral of ( E dot dL) from B to A
What direction is the dr vector? Is it the direction of the line integral?
Say I want to derive the formula for electric potential due to a point in Space. E has a direction vector of ar
assume dL is pointing from infinity to A (-ar), which is opposite of the Eletric Field. And the formula ends up with a negative sign, which is not consistent with the formal formula.
Why?
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