What is the main advantage of using a FET over a BJT?

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Question: What is the main advantage of using a FET over a BJT?

Options:

Correct Answer: Higher input impedance

Solution:

Field Effect Transistors (FETs) have a higher input impedance compared to BJTs, making them suitable for high-impedance applications.

What is the main advantage of using a FET over a BJT?

What is the main advantage of using a FET over a BJT?

Step 1: Understand what a FET (Field Effect Transistor) is. It is a type of transistor that uses an electric field to control the flow of current.
Step 2: Understand what a BJT (Bipolar Junction Transistor) is. It is another type of transistor that uses both electron and hole charge carriers to control current.
Step 3: Learn about input impedance. Input impedance is a measure of how much a device resists incoming signals. Higher input impedance means the device can accept signals without drawing much current.
Step 4: Compare the input impedance of FETs and BJTs. FETs have a higher input impedance than BJTs.
Step 5: Recognize the advantage. Because FETs have higher input impedance, they are better for applications where you want to avoid loading down the signal source, such as in high-impedance circuits.

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