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Why Named as Field Effect Transistor (FET)? Video Lecture | Analog and Digital Electronics - Electrical Engineering (EE)

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FAQs on Why Named as Field Effect Transistor (FET)? Video Lecture - Analog and Digital Electronics - Electrical Engineering (EE)

1. Why is it called a Field Effect Transistor (FET)?
Ans. The term "Field Effect Transistor" (FET) is used because the transistor's operation is based on the electric field effect that occurs within its structure. The electric field controls the conductivity of the semiconductor channel, allowing for the amplification and control of electrical signals.
2. What is the difference between a FET and a regular transistor?
Ans. The main difference between a Field Effect Transistor (FET) and a regular transistor (such as a bipolar junction transistor) lies in their modes of operation. FETs rely on the electric field created by the input voltage to control the flow of current, while regular transistors rely on the current flowing through the base terminal to control the collector current.
3. How does a Field Effect Transistor work?
Ans. A Field Effect Transistor (FET) operates by controlling the conductivity of a semiconductor channel by means of an electric field. When a voltage is applied to the gate terminal, it creates an electric field that modifies the distribution of charge carriers in the channel, allowing or blocking the flow of current between the source and drain terminals.
4. What are the advantages of using FETs in electronic circuits?
Ans. Some advantages of using Field Effect Transistors (FETs) in electronic circuits include: - High input impedance, which allows for easy interfacing with other components. - Low power consumption, making them suitable for battery-powered devices. - High switching speed, enabling faster operation in digital circuits. - Noise immunity, as FETs are less susceptible to noise interference compared to regular transistors.
5. What are the different types of FETs?
Ans. There are three main types of Field Effect Transistors (FETs): 1. Junction Field Effect Transistor (JFET): This type of FET uses a pn-junction to control the flow of current. 2. Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET): MOSFETs are the most commonly used FETs and rely on an insulating layer between the gate and channel. 3. Insulated-Gate Bipolar Transistor (IGBT): The IGBT combines the characteristics of a MOSFET and a bipolar transistor, allowing for high voltage and current handling capabilities.
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