From equation ( ), one can observe that when a zero voltage is applied to the semi-conductor diode, the drift current totally balances the diffusion current.
12.
At equilibrium in a p n junction, the forward diffusion current in the depletion region is balanced with a reverse drift current, so that the net current is zero.
13.
The limiting current ( the plateau on the sigmoid ), called the diffusion current because diffusion is the principal contribution to the flux of electroactive material at this point of the Hg drop life.
14.
At equilibrium, there is no net flow of particles : the tendency of particles to get pulled towards lower U, called the " drift current ", perfectly balances the tendency of particles to spread out due to diffusion, called the " diffusion current " ( see drift-diffusion equation ).
