What is the L/R constant for this series circuit?

[thomas49th]

Homework Statement

Consider the series circuit with

supply -- resistor (4K) -- inductor (1m) -- resistor (1K) -- groud

Homework Equations

I just don't know. According to the answer sheet it's 1us.

The Attempt at a Solution

Reverse engineering from this implies it's only the inductor and resistor connect to ground (1K) that influence the L/R... why not the 4K!?


Thanks
Thomas

 

[ideasrule]

That can't be right, because the "R" in L/R is total resistance.

 

[thomas49th]

Basically using that circuit I need to plot the freq-magnitude response on a bode plot... that is the mag response between the inductor, 1k and ground. Let's call this point X. The magnitude response is X/supply. On a bode plot is should be negative (or 0) as the voltage across the 2 components is a fraction of the original and on a bode plot, numbers <1 are -ve.