$\begin{array}{1 1} z= 3.30\;ohm , \Delta t= \large\frac{1}{250} \;sec \\ z= 330\;ohm , \Delta t= 250 \;sec \\ z= 0.330\;ohm , \Delta t= \large\frac{1}{250} \;sec \\ z= 3.30\;ohm , \Delta t= 250 \;sec \end{array} $