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Response of RL Circuits

The questions below are due on Wednesday October 23, 2019; 11:59:00 PM.
 
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In the following circuit, the switch has been closed for a very long time prior to t=0 so that the circuit has reached equilibrium. The switch then opens at t=0 as indicated. Determine the inductor current i(t) for both t<0 and t\ge 0 for the circuit below.

In the answers below, use exp() for the exponential, i.e., exp(5) for e^5.


Part A

Determine the value of i(t) (in A) at t=0^-.

i(t=0_-)=


Part B

Enter an expression for i(t) (in A) for t>0.

i(t)=