CP In the circuit shown in Fig. P30.61, = 60.0 V, R1 = 40.0 Ω, R2 = 25.0 Ω, and L =...

CP In the circuit shown in Fig. P30.61, = 60.0 V, R₁ = 40.0 Ω, R₂ = 25.0 Ω, and L = 0.300 H. (a) Switch S is closed. At some time t afterward, the current in the inductor is increasing at a rate of di/dt = 50.0 A/s. At this instant, what are the current i₁ through R₁ and the current i₂ through R₂? (Hint: Analyze two separate loops: one containing and R₁ and the other containing , R₂, and L.) (b) After the switch has been closed a long time, it is opened again. Just after it is opened, what is the current through R₁?