Tao = R(th) C
The Attempt at a Solution
The unknown DC circuit model consists of a V(th) and R(th)
Tao = (R(th) + 3000) C , total resistance of circuit is R(th) + 3000
0.004 = (R(th) + 3000) (1x10^-6)
R(th) = 1 kOhm
The V(th) should oppose the known source since i(t) goes to 0.
Doing a KVL around the loop clockwise.
-10V + 3000( I ) + I (1000) + V(th) = 0, Voltage across capacitor is 0 since at t=0 it is like steady state.
also, at t=0, I = 0.001 A
then solving gives V(th) = 6V
I get the hunch that the working is wrong but the answer is right by coincidence. Would the working be correct?
Thank you very much.