so a closed circuit will have an inductance of 
when the current in it varies at a rate of 
to produce an induced voltage of 
[P4.4, P4.5]
is: the SI unit of inductance.
is defined: by so a closed circuit will have an inductance of when the current in it varies at a rate of to produce an induced voltage of [P4.4, P4.5]
is, for practical purposes: a medium sized unit. Widely used inductances vary from a few microhenry to hundreds of henry. [P4.5, P5.4]
See also coefficient of mutual inductance and coefficient of self inductance.
Copyright 1997, The Open University