1  Mobility
As we have seen, conductivity arises from mobile charge carriers In
metals, these mobile charge carriers are electrons; in an ionised gas, they
are electrons and positive charged ions; in an electrolyte, these can be
both positive and negative ions An important quantity is the mobility m defined as the magnitude of
the drift velocity per unit electric field:
|
Ed|
µ = v
(3 24)
The SI unit of mobility is m2/Vs and is 104 of the mobility in practical
units (cm2/Vs)