Question

For the SCR to remain in the ON (conducting) state

(a) gate signal is continuously required

(b) no continuous gate signal is required

(c) no forward anode-cathode voltage is required

(d) negative gate signal is continuously required

This question was posed to me during an interview for a job.

Question is from Thyristors-2 topic in section Power Electronics Devices of Power Electronics

Answer 1

Correct option is (b) no continuous gate signal is required

For explanation I would say: Unlike the transistor devices, once the SCR is turned on by the gate terminal, the gate terminal losses its control over the device.