7.10 In the circuit in Fig. P7.10, the switch has been closed for a long time before opening at t = 0. a) Find the value of L so that v(t) equals 0.5 vo(0+) when 1 ms. t = b) Find the percentage of the stored energy that has been dissipated in the 10 2 resistor when t = 1 ms. Figure P7.10 30 mA ΣΙΚΩ 1 = 0 9 ΚΩ w 10Ω ΣΕ L