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Main Question or Discussion Point
The flux rule for motional emf can be stated as:
d[itex]\phi[/itex]/dt = [itex]\epsilon[/itex]
I have some questions regarding this. 1) Should I find this rule intuitive?
And secondly a proof of this rule is given in my book, which I have attached. I don't really understand the idea of the proof  is the idea to proof the above rule or to just proof that if it works, it will do so for loops, which "do not even maintain a fixed shape". Because the words seem to suggest the later but on the other hand that would mean that the above rule is generally unproved in my book.
d[itex]\phi[/itex]/dt = [itex]\epsilon[/itex]
I have some questions regarding this. 1) Should I find this rule intuitive?
And secondly a proof of this rule is given in my book, which I have attached. I don't really understand the idea of the proof  is the idea to proof the above rule or to just proof that if it works, it will do so for loops, which "do not even maintain a fixed shape". Because the words seem to suggest the later but on the other hand that would mean that the above rule is generally unproved in my book.
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