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Why does the second term become zero??
Simple calculation about Magnetic induction
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Why does the second term become zero??
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Because it does not exist. If, in the previous equation, you substitute the gradient with some vector ##\vec{V} = \vec{\nabla} \left ( \frac{1}{|\vec{x}-\vec{x}'|} \right )##, you will see why. There is no vector identity in the front of the book to be used.BREAD said:
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The derivative ##\nabla## is with respect to ##\vec{x}##, not ##\vec{x}'##.BREAD said:
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