Question

when operated in cutoff and saturation, the transistor acts like a
select one:
o a. linear amplifier
o b. variable capacitor
o c. variable resistor
o d. switch

Explanation:

A transistor in cutoff has negligible current (like an open switch), and in saturation, it has low resistance (like a closed switch). A linear amplifier operates in the active region, not cutoff/saturation. A transistor doesn't act like a variable capacitor or resistor in these regions for switching behavior. So the correct choice is d.

Answer:

d. switch