What does BJT stand for?
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A.
Base Junction Transistor
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B.
Binary Junction Transistor
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C.
Bipolar Junction Transistor
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D.
Bi-layer Junction Transistor
Correct Answer:
C. Bipolar Junction Transistor
Explanation:
BJT stands for Bipolar Junction Transistor. It is a three-terminal semiconductor device—comprising the emitter, base, and collector—that utilizes both electrons and electron holes as charge carriers. This dual-carrier nature is why it is termed "bipolar." Structurally, it consists of two p-n junctions formed by layering p-type and n-type materials in either NPN or PNP configurations. Functionally, a BJT acts as a current-controlled device where a small current at the base terminal regulates a significantly larger current between the collector and emitter, allowing it to serve as an effective amplifier or an electronic switch.
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