Find the value of the charging resistor in case of a UJT firing circuit with firing frequency of 2 kHz, C = 0.04 μF, η = 0.72
(a) 5.62 kΩ
(b) 37 kΩ
(c) 4.23 kΩ
(d) 9.82 kΩ
I got this question during an interview for a job.
This key question is from Firing Circuits-3 topic in section Other Circuits of Power Electronics