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Why does this equation make sense on a shorted coil?

smarine
in Engineering

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Suppose, there's a shorted coil which has a wire resistance R.

 

Also, current i is flowing through the wire.

 

Then, my book is saying that flux linkage "lamda" satisfies the equation

 

" - i R = d(lamda)/dt "

Suppose, there's a shorted coil which has a wire resistance R.

 

Also, current i is flowing through the wire.

 

Then, my book is saying that flux linkage "lamda" satisfies the equation

 

" - i R = d(lamda)/dt "

 

That's the equation for Faraday's law of induction, with the substitution that V = IR, which holds in this circuit.

  • Author

But I think that "V = d(lamda)/dt" is Faraday's law of induction, and the sign "- i R" doesn't make sense.

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