The figure below shows the current response of a series RL circuit to a sudden DC current applied through an equivalent resistance of 6 k. Determine the approximate time constant from the figure. Also, determine the value of the inductor. Write the mathematical expression of i(t) for t>0. [Hint: The time it takes for an inductor to be fully charged is approximately five times the time constant]. i(t) (A) 6 LO 5 4 3 2 1 -2 0.5 1 1.5 2 5 A 2.5 3 t (ms)