Explore topic-wise MCQs in Electronic Devices and Circuits.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

The simplified common base amplifier configuration is useful in audio and radio frequency applications.

A. True
B. False
Answer» B. False
Discussion
2.

What is the approximate value of the current gain of a simplified CB amplifier configuration?

A. 1
B.
C.
D. 0
Answer» B.
Discussion
3.

What is the value of in a simplified CB configuration amplifier if IC = 124mA and IB = 1.26mA?

A. 98.41
B. 99.24
C. 100
D. 97.33
Answer» B. 99.24
Discussion
4.

How do we compute the output impedance of a simplified CB amplifier?

A. R<sub>C</sub> + R<sub>L</sub>
B. R<sub>B</sub> + R<sub>L</sub>
C. R<sub>C</sub> || R<sub>L</sub>
D. R<sub>B</sub> || R<sub>L</sub>
Answer» D. R<sub>B</sub> || R<sub>L</sub>
Discussion
5.

How do we compute the voltage gain of a simplified CB amplifier?

A. R<sub>B</sub> || r<sub>e</sub>
B. R<sub>C</sub> || r<sub>e</sub>
C. R<sub>B</sub> / r<sub>e</sub>
D. R<sub>C</sub> / r<sub>e</sub>
Answer» E.
Discussion
6.

What is the bias of a simplified common base (CB) amplifier configuration?

A. Reverse biased
B. Forward biased
C. Forward and reverse biased
D. It is independent of the bias
Answer» C. Forward and reverse biased
Discussion
7.

What is the value of voltage VB of a CB amplifier configuration if VCC = 12V, R1 = 25k and R2 = 6k ?

A. 2.84V
B. 13.03V
C. 2.45V
D. 2.32V
Answer» E.
Discussion
8.

How do we compute the voltage gain of a simplified CB amplifier model using hybrid parameters?

A. h<sub>fe</sub> R<sub>L</sub> / h<sub>ie</sub>
B. -h<sub>fe</sub> R<sub>L</sub> / h<sub>ie</sub>
C. h<sub>fe</sub> R<sub>L</sub> / h<sub>oe</sub>
D. -h<sub>fe</sub> R<sub>L</sub> / h<sub>oe</sub>
Answer» B. -h<sub>fe</sub> R<sub>L</sub> / h<sub>ie</sub>
Discussion
9.

How do we compute the input resistance of a simplified CB amplifier model using hybrid parameters?

A. h<sub>fe</sub> / 1 h<sub>fe</sub>
B. h<sub>fe</sub> / 1 + h<sub>fe</sub>
C. h<sub>ie</sub> / 1 h<sub>fe</sub>
D. h<sub>ie</sub> / 1 + h<sub>fe</sub>
Answer» E.
Discussion
10.

How do we compute the current gain of a simplified CB amplifier model using hybrid parameters?

A. -h<sub>fe</sub> / 1 + h<sub>fe</sub>
B. -h<sub>fe</sub> / 1 h<sub>fe</sub>
C. h<sub>fe</sub> / 1 + h<sub>fe</sub>
D. h<sub>fe</sub> / 1 h<sub>fe</sub>
Answer» D. h<sub>fe</sub> / 1 h<sub>fe</sub>
Discussion