Electrode between the emitter and the collector that controls the amount of current passed

Electrode between the emitter and the collector that controls the amount of current passed

• A. Base
• B. Emitter
• C. Base Current
• D. Collector

Answer: (C)

In a bipolar junction transistor, the path between the emitter and collector is the base region, which serves as the control terminal. The transistor conducts from collector to emitter based on the small current injected into the base. This base current governs the much larger collector current, described by I_C ≈ β I_B, where β is the current gain. So the amount of current that can pass from collector to emitter is set by the base current. The base current is the actual control signal, even though the electrode through which that control current flows is the base terminal. For example, with a current gain of 100, a base current of 0.1 mA yields about 10 mA of collector current. The other terminals—emitter and collector—carry the main current, while the base current is what modulates it.

In a bipolar junction transistor, the path between the emitter and collector is the base region, which serves as the control terminal. The transistor conducts from collector to emitter based on the small current injected into the base. This base current governs the much larger collector current, described by I_C ≈ β I_B, where β is the current gain. So the amount of current that can pass from collector to emitter is set by the base current. The base current is the actual control signal, even though the electrode through which that control current flows is the base terminal. For example, with a current gain of 100, a base current of 0.1 mA yields about 10 mA of collector current. The other terminals—emitter and collector—carry the main current, while the base current is what modulates it.