Rationalised 2023-24
Current
Electricity
85
        E l = j r l
or,    E = j r
(3 11)
The above relation for magnitudes E and j can indeed be cast in a
vector  form The current density, (which we have defined as the current
through unit area normal to the current) is also directed along E, and is
also a vector j (ººººº j E/E) Thus, the last equation can be written as,
        E = jr
(3