In a silicon-controlled rectifier (SCR), which process triggers a transition from blocking to conducting state?

💡 Explanation

The SCR switches on due to gate trigger carrier injection causing a surge of current carriers into the p-layer, therefore overcoming the reverse bias characteristics of the junctions, rather than relying on voltage alone, or thermal processes.

• Which outcome occurs when applying reverse bias to a laser diode?
• Which risk increases when piston ring sticking occurs in heavy machinery?
• Within closed-die forging of steel gears, which outcome occurs when the billet's initial temperature is locally too low?
• Which calculation introduces cumulative error in robotic arm control?
• Which hazard arises when a three-phase circuit breaker fails to interrupt a short circuit?
• Which outcome occurs when thermal expansion of a bimetallic strip regulates fuel gas flow in a domestic storage water heater?