For the circuit in Fig. 1:a. Write the mathematical expressions for the current iL and the...

For the circuit in Fig. 1:

a. Write the mathematical expressions for the current iL and the voltage υL following the closing of the switch. Note the magnitude and the direction of the initial current.

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b. Sketch the waveform of iL and υL for the entire period from initial value to steady-state level.

FIG. 1