Basic Electronics (3110016) MCQs

MCQs of Field effect transistors (FET) and its biasing

Showing 41 to 50 out of 99 Questions
2 3 4 5 6 7
41.
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:

Option (a)

42.
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:

Option (b)

43.
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:

Option (a)

44.
______ has the lowest noise-level
(a) Triode
(b) Ordinary transistor
(c) Tetrode
(d) JFET
Answer:

Option (d)

45.
A MOSFET is sometimes called ______ JFET
(a) Many gate
(b) Open gate
(c) Insulated gate
(d) Shorted gate
Answer:

Option (c)

46.
Which of the following devices has the highest input impedance?
(a) JFET
(b) MOSFET
(c) Crystal diode
(d) Ordinary transistor
Answer:

Option (b)

47.
A MOSFET uses the electric field of a _______ to control the channel current
(a) Capacitor
(b) Battery
(c) Generator
(d) None of the above
Answer:

Option (a)

48.
The pinch-off voltage in a JFET is analogous to _______ voltage in a vacuum tube
(a) Anode
(b) Cathode
(c) Grid cut off
(d) None of the above
Answer:

Option (c)

49.
The formula for AC drain resistance of a JFET is ________
(a) at constant VGS
(b) at constant VDS
(c) at constant VDS
(d) at constant VGS
Answer:

Option (a)

50.
In class A operation, the input circuit of a JFET is ________ biased
(a) Forward
(b) Reverse
(c) Not
(d) None of the above
Answer:

Option (b)

Showing 41 to 50 out of 99 Questions
2 3 4 5 6 7