The circuit in Figure P5.35 is a simple model of an automotive ignition system. The switch models the “points” that switch electric power to the cylinder when the fuel-air mixture is compressed. R is the resistance across the gap between the electrodes of the spark plug.

VG = 12V RG = 0.37? R = 1.7 k?

Determine the value of L and R1 so that the voltage across the spark plug gap just after the switch is changed is 23 kV and so that this voltage will change exponentially with a time constant ? = 13 ms.


Analysis:



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