The Junction Field-Effect Transistor – 1 MCQ’s

Electronic Devices & Circuits Electronics & Communication Engineering

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Junction Field-Effect Transistor – 1″.

1. Which of the following statement is true about FET?
a) It has high output impedance
b) It has high input impedance
c) It has low input impedance
d) It does not offer any resistance

2. Comparing the size of BJT and FET, choose the correct statement?
a) BJT is larger than the FET
b) BJT is smaller than the FET
c) Both are of same size
d) Depends on application

3. FET is a voltage controlled device.
a) True
b) False

4. What is the main advantage of FET which makes it more useful in industrial applications?
a) Voltage controlled operation
b) Less cost
c) Small size
d) Semiconductor device

5. What is the value of current when the gate to source voltage is less than the pinch off voltage?
a) 1A
b) 5A
c) 100A
d) 0

6. What is the value of drain current when Vgs=pinch off voltage?
a) 0A
b) 1A
c) 2A
d) Cannot be determined

7. For a FET when will maximum current flows?
a) Vgs = 0V
b) Vgs = 0v and Vds >= |Vp|
c) VDS >= |Vp|
d) Vp = 0

8. The Shockley equation is __________________
a) ID = (1 – Vgs/Vp)2
b) ID = IDSS (1 – Vgs/Vp)2
c) ID = IDSS (1 – Vgs/Vp)1
d) ID = IDSS (1 + Vgs/Vp)2

9. To use FET as a voltage controlled resistor, in which region it should operate?
a) Ohmic region
b) cut off
c) Saturation
d) cut off and saturation

10. For a p-channel FET, What is the direction of current flow?
a) Source to drain
b) Drain to source
c) Gate to source
d) Gate to drain

11. For an n-channel FET, What is the direction of current flow?
a) Source to drain
b) Drain to source
c) Gate to source
d) Gate to drain

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