Basic Electronics (3110016) MCQs

MCQs of Field effect transistors (FET) and its biasing

Showing 61 to 70 out of 99 Questions
4 5 6 7 8 9
61.
For VGS = 0 V, the drain current becomes constant when VDS exceeds __________
(a) Cut off
(b) VDD
(c) VP
(d) 0 V
Answer:

Option (c)

62.
A certain JFET datasheet gives VGS(off) = –4 V. the pinch off voltage VP is _______
(a) + 4 V
(b) – 4 V
(c) Dependent on VGS
(d) Data insufficient
Answer:

Option (a)

63.
The constant-current region of a JFET lies between _________
(a) Cut off and saturation
(b) Cut off and pinch off
(c) 0 and IDSS
(d) Pinch off and breakdown
Answer:

Option (d)

64.
At cut-off, the JFET channel is _______
(a) At its widest point
(b) Completely closed by the depletion region
(c) Extremely narrow
(d) Reverse biased
Answer:

Option (b)

65.
A MOSFET differs from a JFET mainly because _________
(a) Of power rating
(b) The MOSFET has two gates
(c) The JFET has a PN junction
(d) None of the above
Answer:

Option (c)

66.
A certain D-MOSFET is biased at VGS = 0 V. Its data sheet specifies IDSS = 20 mA and VGS(off) = -5 V. The value of the drain current is ________
(a) 20 mA
(b) 0 mA
(c) 40 mA
(d) 10 mA
Answer:

Option (a)

67.
An N-channel D-MOSFET with a positive VGS is operating in _______
(a) The depletion-mode
(b) The enhancement-mode
(c) Cut off
(d) Saturation
Answer:

Option (b)

68.
A certain P-channel E-MOSFET has a VGS(th)= 0 V, the drain current is _______
(a) 0 mA
(b) ID(on)
(c) Maximum
(d) IDSS
Answer:

Option (a)

69.
In common-source JFET amplifier, the output voltage is ________
(a) 180⁰ out of phase with the input
(b) In phase with the input
(c) 90⁰ out of phase with the input
(d) Taken at the source
Answer:

Option (a)

70.
In a certain common-source D-MOSFET amplifier, VDS= 3.2 V RMS and VGS= 280 mV RMS. The voltage gain is ________
(a) 1
(b) 11.4
(c) 8.75
(d) 3.2
Answer:

Option (b)

Showing 61 to 70 out of 99 Questions
4 5 6 7 8 9