The gap in the circuit seen in (Figure 1) will arc over whenever the voltage across the gap reaches 36 kV. The initial current in the inductor is zero. The value of ? is adjusted so the Thévenin resistance with respect to the terminals of the inductor is -6.0 k?.
PART A:
What is the value of ??
Express your answer using three significant figures.
PART B:
How many microseconds after the switch has been closed will the gap arc over?
Express your answer in microseconds to three significant figures.