Question

select one:
○ a. a current - controlled device
○ b. a voltage - controlled device
○ c. a bi - polar device
○ d. a switched - capacitive device

Explanation:

In the context of semiconductor devices (e.g., MOSFET), many are voltage - controlled. A voltage - controlled device's operation is mainly governed by the applied voltage (e.g., the gate - source voltage in a MOSFET controls the current flow). Current - controlled devices (like BJTs) rely on current for control. Bipolar devices involve both majority and minority carriers, and switched - capacitive devices are more about charge transfer in switched capacitor circuits. So, the most appropriate option for a typical voltage - controlled device (e.g., MOSFET) is option b.

Answer:

b. a voltage - controlled device