Q.1
Which of the following can be considered to be an advantage of FET amplifier as compared to BJT amplifier?
  • a) A, B and C
  • b) A, B and D
  • c) B, C and D
  • d) A, C and D
Q.2
Two identical FETs, each characterized by the parameters g_m and r_d are connected in parallel .The composite FET is then characterized by the parameters_____________
  • a) gm/2 and 2rd
  • b) gm/2 and 2rd
  • c) 2gm and rd/2
  • d) 2gm and rd/2
Q.3
The pinch off voltage of JFET is 5v. What is its cut off voltage?
  • a) 2.5V
  • b) 3V
  • c) 4V
  • d) 5V
Q.4
The action of JFET in its equivalent circuit can be represented as which of the following?
  • a) Current controlled current source
  • b) Current controlled voltage source
  • c) Voltage controlled current source
  • d) Voltage controlled Voltage source
Q.5
Which of the following is the main advantage of Self bias?
  • a) Eliminates the need of two power supply
  • b) Maximum stability
  • c) Minimum stability
  • d) Maximum & Minimum stability
Q.6
FET amplifier does not obey the law of conservation of energy.
  • a) True
  • b) False
Q.7
Which of the following is the necessary condition to design an amplifier?
  • a) Vce ≤ 1⁄10 of RC
  • b) |Vce| ≤ 1⁄10 of RC
  • c) |Vce| ≤ 1⁄1000 of RC
  • d) |Vce| ≤ 1⁄100 of RC
Q.8
At higher frequency, the capacitance of an amplifier circuit is mainly because of which capacitance?
  • a) Coupling capacitors
  • b) Stray capacitance
  • c) Resistors
  • d) Inductors
Q.9
Which of the following is the equation for stray capacitance frequency?
  • a) FH = 1/27R
  • b) FH = 1/R
  • c) FH = 54/27R
  • d) FH = 11/27R
Q.10
What is the maximum value of gain of an amplifier?
  • a) 140dB
  • b) 130dB
  • c) 120db
  • d) 100dB
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