R-L Transients Storage Phase: "Inductors" Help?
I get a time constant of 31.3 &micro;s &mdash; it looks like you ignored the effects of R1.

E, R1 and R2 can be combined to create an equivalent Th&eacute;venin source with an open-circuit voltage of 6.803 V and a series impedance of 319.7 &Omega;. These are the values you should use for computing the transient response.

The voltage across the inductor VL will start out at the voltage of the Th&eacute;venin source and then decay to zero as time goes on and the current builds up to the final value. The general form is:

VL = V0 e&#150;T/&tau;

where &tau; is the time constant computed above. At no point should you get a voltage that's greater than the source voltage!