Self Inductance

" A physicist is just an atom's way of looking at itself"
Niels Bohr
so that the induced emf - sometimes called a "back emf" - is given by
This "back emf" always opposes the primary emf (due to Lenz's Law), as shown in the diagram at right.
hot From above,   magselfindeqn4 which can be compared to the similar equation for capacitance  magselfindeqn5 .
  • Calculating self inductance proceeds by the same steps as mutual inductance - Calculate B, calculate magnetic flux, then use the second equation above to determine L.

Renee Descartes walks into a bar, the bartender says 'sir can I get you a martini 'Descartes says 'I don't think...' and he disappears.


Dr. C. L. Davis
Physics Department
University of Louisville