DC Biasing-FETs Questions and Answers
DC Biasing-FETs questions with answers are essential for students studying analog electronics and preparing for exams like GATE, DRDO, and BHEL. This topic explains how Field Effect Transistors (FETs) operate under various biasing conditions to achieve stability and amplification. Practicing aptitude questions and answers with explanations on DC biasing of FETs helps strengthen your understanding of electronic circuits, current flow, and transfer characteristics. These aptitude questions with solutions PDF also improve analytical and problem-solving skills needed for competitive exams and placement tests in core electronics companies like BEL and ISRO.
DC Biasing-FETs
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14 questions
1. For the FET, the relationship between the input and output quantities is ________ due to the ________ term in Shockley's equation.
- nonlinear, cubed
- linear, proportional
- nonlinear, squared
2. Which of the following is (are) true of a self-bias configuration compared to a fixed-bias configuration?
- One of the dc supplies is eliminated.
- A resistor RS is added.
- VGS is a function of the output current ID.
- All of the above
3. The input controlling variable for a(n) ________ is a current level and a voltage level for a(n) ________.
- BJT, FET
- FET, BJT
- FET, FET
- BJT, BJT
4. Through proper design, a ________ can be introduced that will affect the biasing level of a voltage-controlled JFET resistor.
- photodiode
- thermistor
- laser diode
- Zener diode
5. On the universal JFET bias curve, the vertical scale labeled ________ can, in itself, be used to find the solution to ________ configurations.
- m, fixed-bias
- M, fixed-bias
- M, voltage-bias
- m, voltage-bias
6. Which of the following represents the voltage level of VGS in a self-bias configuration?
- VG
- VGS(off)
- VS
- VP
7. The self-bias configuration eliminates the need for two dc supplies.
- TRUE
- FALSE
8. Which of the following is a false statement regarding the dc load line when comparing self-bias and voltage-divider configurations?
- Both are linear lines.
- Both cross the origin.
- Both intersect the transfer characteristics.
- Both are obtained by writing Kirchhoff's voltage law (KVL) at the input side loop.
9. For the noninverting amplifier, one of the most important advantages associated with using a JFET for control is the fact that it is ________ rather than ________ control.
- dc, ac
- ac, dc
10. Depletion-type MOSFETs do not permit operating points with positive values of VGS and levels of ID that exceed IDSS.
- TRUE
- FALSE