Q1. The switch in the circuit below has been closed for a long time before it is opened at t = 0. 1. Draw equivalent circuits at t = 0- and t = 0+. Then determine 2. Is i2(0-) = i2(0+)? Explain why. Q2. The switch in the circuit below has been in position 1 for a long time. At t = 0, the switch moves instantaneously to position 2. Draw equivalent circuits at t = 0+ and t = 0-. Then find the value of the resistance R so that 50% of the initial energy stored in the 150 mH inductor is dissipated in R within 30 mus.