Question

1. transistor saturation and cutoff regions are used in circuits referred to as ________. a. rectifiers b. filters c. switching circuits d. amplifiers

Explanation:

Transistors in saturation (fully - on) and cutoff (fully - off) regions act like switches. Rectifiers convert AC to DC (not related to saturation/cutoff as main function). Filters smooth signals (not based on transistor saturation/cutoff). Amplifiers use the active region of transistors (not saturation and cutoff).

Answer:

C. switching circuits