At t =0s, the current in the circuit in the figure is I0. At what time is the current 12I0?

current-circuit

#1

At t =0s, the current in the circuit in the figure is I0. At what time is the current 12I0?

image

Answer:

The expression for the current in RL circuit is given by,
image
Substitute image for I in above equation as follows:
image
Rearrange the above equation as follows:
image

image