Electrical Engineering (EE) Exam > Electrical Engineering (EE) Videos > Analog and Digital Electronics > Transistors: How do they work?
Transistors: How do they work? Video Lecture | Analog and Digital Electronics - Electrical Engineering (EE)
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FAQs on Transistors: How do they work? Video Lecture - Analog and Digital Electronics - Electrical Engineering (EE)
| 1. How does a transistor work? |  |
Ans. A transistor is a semiconductor device that can amplify or switch electronic signals. It consists of three layers of semiconductor material: the emitter, base, and collector. By controlling the flow of current between the emitter and collector through the base, a transistor can amplify small signals or act as a switch.
| 2. What is the role of the emitter, base, and collector in a transistor? | |
Ans. The emitter is responsible for emitting electrons or holes, the base controls the flow of current between the emitter and collector, and the collector collects the majority charge carriers that pass through the base. Together, these three layers determine the functionality of the transistor.
| 3. How does a transistor amplify a signal? | |
Ans. Transistors amplify signals by controlling the flow of current between the emitter and collector. A small input signal applied to the base can control a much larger output current flowing from the emitter to the collector, thus amplifying the signal.
| 4. What are the different types of transistors? | |
Ans. There are two main types of transistors: bipolar junction transistors (BJTs) and field-effect transistors (FETs). BJTs use both electron and hole charge carriers, while FETs rely on either electrons or holes for their operation.
| 5. How are transistors used in electronic circuits? | |
Ans. Transistors are used in electronic circuits for various purposes, such as amplification, switching, oscillation, and signal modulation. They are essential components in devices like computers, televisions, radios, and smartphones.
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