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Free download in PDF Field Effect Transistor Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
A MOSFET is sometimes called ………. JFET
[A]
many gate
[B]
open gate
[C]
insulated gate
[D]
shorted gate
(2)
…………. has the lowest noise-level
[A]
triode
[B]
ordinary trnsistor
[C]
tetrode
[D]
JFET
(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
(9)
A JFET has ……….. power gain
[A]
small
[B]
very high
[C]
very small
[D]
none of the above
(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
(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
(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
(14)
In a p-channel JFET, the charge carriers are …………..
[A]
electrons
[B]
holes
[C]
both electrons and holes
[D]
none of the above
(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
(16)
The gate of a JFET is ………… biased
[A]
reverse
[B]
forward
[C]
reverse as well as forward
[D]
none of the above
(17)
A JFET is a ………… driven device
[A]
current
[B]
voltage
[C]
both current and voltage
[D]
none of the above
(18)
A JFET is also called …………… transistor
[A]
unipolar
[B]
bipolar
[C]
unijunction
[D]
none of the above
(19)
A JFET is similar in operation to …………. valve
[A]
diode
[B]
pentode
[C]
triode
[D]
tetrode
(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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