This phenomenon is called
self-induction In this case, flux linkage through a coil of N turns is
proportional to the current through the coil and is expressed as
NB
I
Φ ∝
B
L
N
I
Φ
=
(6 13)
where constant of proportionality L is called self-inductance of the coil It
is also called the coefficient of self-induction of the coil