The generalised law is
B
�gl
d =
d
d
0
µ
µ
ε
0
0
i
t
c
E
+
∫
Φ
(8 6)
and is known as Ampere-Maxwell law In all respects, the displacement current has the same physical
effects as the conduction current In some cases, for example, steady
electric fields in a conducting wire, the displacement current may
be zero since the electric field E does not change with time