What is a BJT?

Bit Junction Transfer
Bi-polar Junction Transistor
Bell Jar Transformer
Back Junction Transformer

The correct answer is: Bi-polar Junction Transistor (BJT).

A BJT is a type of transistor that uses both electrons and holes as charge carriers. It is a three-terminal device, with the emitter, base, and collector. The emitter and collector are connected to the power supply, and the base is used to control the flow of current between them.

BJTs are used in a wide variety of electronic devices, including amplifiers, oscillators, and switches. They are also used in integrated circuits.

Here is a brief explanation of each option:

  • Bit Junction Transfer: This is not a real term.
  • Bi-polar Junction Transistor: This is the correct answer. A BJT is a type of transistor that uses both electrons and holes as charge carriers.
  • Bell Jar Transformer: This is not a real term.
  • Back Junction Transformer: This is not a real term.