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Free download in PDF Field Effect Transistor Short 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.
41
If load resistance in the above question (Q.49) is removed, the output voltage will …………
[A]
increase
[B]
decrease
[C]
stay the same
[D]
be zero
42
A CS JFET amplifier has a load resistance of 10 kO , RD= 820O . If gm= 5mS and Vin= 500 mV, the output signal voltage is ………..
[A]
2.05 V
[B]
25 V
[C]
0.5 V
[D]
1.89 V
43
A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ……………….
[A]
the voltage gain will increase
[B]
the transconductance will increase
[C]
the voltage gain will decrease
[D]
the Q-point will shift
Answer: the voltage gain will decrease
44
In a certain CS JFET amplifier, RD= 1kO , RS= 560 O , VDD=10V and gm= 4500 µS. If the source resistor is completely bypassed, the voltage gain is …………
[A]
450
[B]
45
[C]
2.52
[D]
4.5
45
In a certain common-source D-MOSFET amplifier, Vds =3.2 V r.m. and Vgs = 280 mV r.m.s. The voltage gain is …………
[A]
1
[B]
11.4
[C]
8.75
[D]
3.2
46
In a common-source JFET amplifier, the output voltage is …………………
[A]
180o out of phase with the input
[B]
in phase with the input
[C]
90o out of phase with the input
[D]
taken at the source
Answer: 180o out of phase with the input
47
A certain p-channel E-MOSFET has VGS(th) = -2V. If VGS= 0V, the drain current is ……….
[A]
0 mA
[B]
ID(on)
[C]
maximum
[D]
IDSS
48
A 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: the enhancement-mode
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