When a silicon controlled rectifier's (SCR) anode and cathode are reversed biased, a trigger pulse applied on the gate will cause it to?

When a silicon controlled rectifier (SCR) has its anode and cathode reversed biased, it is in a state where it is not capable of conducting current. In this state, the SCR behaves like an open switch. When a trigger pulse is applied to the gate of a reverse-biased SCR, it does not influence the device's behavior; the SCR will remain in a non-conducting state. This is due to the fundamental operation of SCRs, which require proper forward bias conditions to start conducting. Only when the anode is more positive than the cathode and a triggering signal is applied on the gate, will the SCR turn on and start conducting. Thus, in reverse bias with a gate pulse, the SCR will remain unchanged, affirming that the correct answer is the appropriate response regarding the operation of SCRs under these conditions.