Define a steady state current ?

[devd]

For a steady state current, is $\frac{dI}{dt}=0$ or is $\frac{\partial I}{\partial t} = 0$?

 

[Dale]

Steady state anything means partial derivative with respect to time is 0. Often the quantity of interest is only a function of time, so you can change it to a normal derivative.

 

[sophiecentaur]

For a steady state current, is $\frac{dI}{dt}=0$ or is $\frac{\partial I}{\partial t} = 0$?

I think you'd need to specify the situation that you would be describing in order to make the choice of which to use.