Field Effect Transistor Quiz | Field Effect Transistor Multiple Choice Questions and Answers

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Questions
1 A MOSFET is sometimes called ………. JFET
A many gate
B open gate
C insulated gate
D shorted gate

Answer: insulated gate
2 …………. has the lowest noise-level
A triode
B ordinary trnsistor
C tetrode
D JFET

Answer: JFET
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3 The two important advantages of a JFET are …………..
A high input impedance and square-law property
B inexpensive and high output impedance
C low input impedance and high output impedance
D none of the above

Answer: high input impedance and square-law property
4 In a JFET, IDSS is known as …………..
A drain to source current
B drain to source current with gate shorted
C drain to source current with gate open
D none of the above

Answer: drain to source current with gate shorted
5 In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ………
A almost touch each other
B have large gap
C have moderate gap
D none of the above

Answer: almost touch each other
6 A JFET has high input impedance because …………
A it is made of semiconductor material
B input is reverse biased
C of impurity atoms
D none of the above

Answer: input is reverse biased
7 A common base configuration of a pnp transistor is analogous to ………… of a JFET
A common source configuration
B common drain configuration
C common gate configuration
D none of the above

Answer: common gate configuration
8 The input control parameter of a JFET is ……………
A gate voltage
B source voltage
C drain voltage
D gate current

Answer: gate voltage
9 A JFET has ……….. power gain
A small
B very high
C very small
D none of the above

Answer: very high
10 A MOSFET can be operated with ……………..
A negative gate voltage only
B positive gate voltage only
C positive as well as negative gate voltage
D none of the above

Answer: positive as well as negative gate voltage
11 A MOSFET has …………… terminals
A two
B five
C four
D three

Answer: three
12 If the reverse bias on the gate of a JFET is increased, then width of the conducting channel …………..
A is decreased
B is increased
C remains the same
D none of the above

Answer: is decreased
13 When drain voltage equals the pinch-off-voltage, then drain current …………. with the increase in drain voltage
A decreases
B increases
C remains constant
D none of the above

Answer: remains constant
14 In a p-channel JFET, the charge carriers are …………..
A electrons
B holes
C both electrons and holes
D none of the above

Answer: holes
15 The input impedance of a JFET is …………. that of an ordinary transistor
A equal to
B less than
C more than
D none of the above

Answer: more than
16 The gate of a JFET is ………… biased
A reverse
B forward
C reverse as well as forward
D none of the above

Answer: reverse
17 A JFET is a ………… driven device
A current
B voltage
C both current and voltage
D none of the above

Answer: voltage
18 A JFET is also called …………… transistor
A unipolar
B bipolar
C unijunction
D none of the above

Answer: unipolar
19 A JFET is similar in operation to …………. valve
A diode
B pentode
C triode
D tetrode

Answer: pentode
20 A JFET has three terminals, namely …………
A cathode, anode, grid
B emitter, base, collector
C source, gate, drain
D none of the above

Answer: source, gate, drain
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