PPSCFPSCNTSPakistan govt jobs
- Subject
- Field Effect Transistors - FETelectrical-engineering-mcqs › field-effect-transistors-fet
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
The MOSFET has the highest input impedance because its gate is insulated by a thin oxide layer, preventing current flow into the gate terminal. In contrast, JFETs have a PN junction at the gate, allowing some leakage current, and BJTs have base current, resulting in lower input impedance. Crystal diodes are not designed for high input impedance applications.
More Field Effect Transistors - FET MCQs
Practice related questions from the same subject.
- 1.Which JFET configuration corresponds to the common base setup in a PNP transistor?
- 2.In a JFET, what does the term IDSS represent?
- 3.For a common-source JFET amplifier with RD = 1 kΩ, RS = 560 Ω, VDD = 10 V, and transconductance gm = 4500 µS, what is the voltage gain if the source resistor is fully bypassed?
- 4.For a p-channel enhancement-mode MOSFET with a threshold voltage (V_GS(th)) of -2V, what is the drain current when the gate-to-source voltage (V_GS) is 0V?
- 5.A D-MOSFET has a gate-to-source voltage (VGS) of 0 V. Given that the datasheet lists IDSS as 20 mA and VGS(off) as -5 V, what is the expected drain current (ID)?
- 6.What happens to the JFET channel when it reaches the cut-off condition?
- 7.If a JFET datasheet specifies the cutoff gate-source voltage (VGS(off)) as -4 V, what is the value of the pinch-off voltage (Vp)?
- 8.In a JFET, the source terminal is analogous to which part of a vacuum tube?
More in Electrical Engineering Mcqs
- A.C. Fundamentals, Circuits and Circuit Theory
- Amplifiers with Negative Feedback
- Analog Electronics
- Basic Electrical Mcqs
- Cables
- Control Systems
- D.C. Generators
- D.C. Motors
- Digital Electronics
- Earthing or Grounding
- Economics of Power Generation
- Electric Traction
- Electrical Engineering Materials
- Electrical Machine Design
- Electrolysis and Storage of Batteries
- Electromagnetic Induction
- Electronic instruments
- Electrostatics
- Heating and Welding
- Hybrid Parameters
- Industrial Drives
- Magnetic Circuit
- Magnetism and Electromagnetism
- Measurement and Instrumentation
- Modulation and Demodulation
- Multi-Stage Transistor Amplifiers
- Network Theorems
- OP-AMP Circuits
- Operational Amplifier
- Oscillators
- Parallel Circuits
- Passive Filters
- Polyphase Induction Motors
- Power Electronics
- Power Generation
- Rectifiers and Converters
- Regulated D.C. Power Supply
- SCR (Silicon Controlled Rectifiers)
- Semiconductor Diode
- Semiconductor Theory
- Series-parallel Circuits
- Single Phase Induction Motors
- Single Stage Transistor Amplifiers
- Solid-State Switching Circuits
- Switchgear and Protection
- Synchronous Motors
- TRANSISTORS
- Transformers
- Transistor Audio Power Amplifiers
- Transistor Biasing
- Transistor Tuned Amplifiers
- Transmission and Distribution
- integrated Circuits