Basic Electronics (3110016) MCQs

MCQs of Field effect transistors (FET) and its biasing

Showing 51 to 60 out of 99 Questions
3 4 5 6 7 8
51.
If the gate of a JFET is made less negative, the width of the conducting channel _______
(a) Remains the same
(b) Is decreased
(c) Is increased
(d) None of the above
Answer:

Option (c)

52.
The pinch-off voltage of a JFET is about _______
(a) 5 V
(b) 0.6 V
(c) 15 V
(d) 25 V
Answer:

Option (a)

53.
The input impedance of a MOSFET is of the order of _______
(a) Ω
(b) A few hundred A few hundred
(c) kOmega;
(d) Several MΩ
Answer:

Option (d)

54.
The gate voltage in a JFET at which drain current becomes zero is called _______ voltage
(a) Saturation
(b) Pinch-off
(c) Active
(d) Cut-off
Answer:

Option (b)

55.
In a FET, there are _______ PN junctions at the sides
(a) Three
(b) Four
(c) Five
(d) Two
Answer:

Option (d)

56.
The transconductance of a JFET ranges from ________
(a) 100 to 500 mA/V
(b) 500 to 1000 mA/V
(c) 0.5 to 30 mA/V
(d) Above 1000 mA/V
Answer:

Option (c)

57.
The source terminal of a JFET corresponds to ________ of a vacuum tube
(a) Plate
(b) Cathode
(c) Grid
(d) None of the above
Answer:

Option (b)

58.
The output characteristics of a JFET closely resemble the output characteristics of _______ valve
(a) Pentode
(b) Tetrode
(c) Triode
(d) Diode
Answer:

Option (a)

59.
If the cross-sectional area of the channel in N-channel JFET increases, the drain current ________
(a) Is increased
(b) Is decreased
(c) Remains the same
(d) None of the above
Answer:

Option (a)

60.
The channel of a JFET is between the _________
(a) Gate and drain
(b) Drain and source
(c) Gate and source
(d) Input and output
Answer:

Option (b)

Showing 51 to 60 out of 99 Questions
3 4 5 6 7 8