Field Effect Transistor Quiz | Field Effect Transistor Short Questions and Answers

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Questions
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

Answer: increase
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

Answer: 1.89 V
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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

Answer: 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

Answer: 11.4
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

Answer: 0 mA
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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