We can safely assume the switch in the circuit of Fig. 8.59 was closed a very long time pr...

We can safely assume the switch in the circuit of Fig. 8.59 was closed a very long time prior to being thrown open at t = 0. (a) Determine the circuit time constant. (b) Obtain an expression for i1(t) which is valid for t > 0. (c) Determine the power dissipated by the 12 Ω resistor at t = 500 ms.