# Basic MOSFET Amplifier Configurations MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Basic MOSFET Amplifier Configurations”.

1. The MOSFET in the following circuit is in which configuration?

a) Common Source (CS)
b) Common Gate (CG)
c) Common Drain (CD)
d) None of the mentioned

2. The MOSFET in the following circuit is in which configuration?

a) Common Source (CS)
b) Common Gate (CG)
c) Common Drain (CD)
d) None of the mentioned

3. In which of the following configuration does a MOSFET works as an amplifier?
a) Common Source (CS)
b) Common Gate (CG)
c) Common drain (CD)
d) All of the mentioned

4. The MOSFET in the following circuit is in which configuration?[/expand]
a) Common Source (CS)
b) Common Gate (CG)
c) Common Drain (CD)
d) None of the mentioned

(Q.5-Q.10) Reference circuit for Q.5-Q.10 The circuit below is the characterization for the amplifier as a functional block.

5. If the value of Rin for the common source configuration is R1 and that for common source with a source resistance configuration is R2 ideally. The ratio of R1/R2 will be
a) R1/R2 = 1
b) 0 < R1/R2 < 1
c) R1/R2 > 1
d) R1/R2 = 0

6. Which of the following is true for the voltage gain (AV) for the common source configuration (represented by A1) and the common gate configuration (represented by A2)?
a) A1 = A2
b) |A1| = |A2| and A1 ≠ A2
c) |A1| > |A2|
d) |A1| < |A2|

7. In which of the following configuration is the input resistance (Ri) not equal to zero ideally?
a) Common source configuration
b) Common source configuration with source resistance
c) Common gate configuration
d) Source follower configuration

8. Which is true for the value of Avo for common source (Represented by A1) and common source with a source resistance (represented by A2).
a) A1 = A2
b) A1 > 2
c) A1 < A2
d) |A1| < |A2|

9. The value of the voltage gain (Av) for the common source with source resistance (represented by A1) and common gate configuration (represented by A2) are related to each other by
a) A1 > A2
b) |A1| > |A2|
c) A1 < A2
d) A1 > A2 and |A1| > |A2|

10. Which of the following has AVO independent of the circuit elements?
a) Common source configuration
b) Common gate configuration
c) Source follower configuration
d) None of the mentioned