(Solved):
a. (16 marks) The switch in the RL circuit shown in Figure 3 was closed for a ...
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a. (16 marks) The switch in the RL circuit shown in Figure 3 was closed for a long time before opening at \( t=0 \) s. i. (14 marks) Derive the expression for \( i_{L}(t) \) for \( t \geq 0 \mathrm{~s} \). ii. (2 marks) Calculate the value of \( v_{L}(t) \) at \( t=5 \mathrm{~ms} \). Figure 3