A(n) ____ is a three-terminal semiconductor device that operates as a switch when triggered into conduction by a gate signal. This device only conducts in one direction.

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An SCR, or Silicon Controlled Rectifier, is a three-terminal semiconductor device that acts as a switch when triggered by a gate signal. It only conducts in one direction, making it useful for applications such as controlling the power to DC motors or lamps. Diacs, triacs, and transistors all have different operating characteristics and are not limited to one-directional conduction.

A(n) ____ Is a Three-Terminal Semiconductor Device That Operates as a Switch