Test: BJT Characteristics & Biasing


10 Questions MCQ Test Topicwise Question Bank for Electronics Engineering | Test: BJT Characteristics & Biasing


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Attempt Test: BJT Characteristics & Biasing | 10 questions in 30 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Topicwise Question Bank for Electronics Engineering for Electrical Engineering (EE) Exam | Download free PDF with solutions
QUESTION: 1

In a transitor, the value of α is 0.97. The value of current gain of common emitter configuration is

Solution:

Current gain of CE configuration is

QUESTION: 2

A transistor has IB = 100 μA and I= 2 mA. If Ichanges by 25 μA and Ichanges by 0.6 mA, the Changes in the value of β Would be

Solution:


QUESTION: 3

For a transistor having α = 0.98, ICBO  = 5 μA and I= 100 μA. The value of IC is 

Solution:


QUESTION: 4

For the circuit shown below, the collector to emitter voltage is

Solution:

Let the transistor be operating under active region.

QUESTION: 5

The reverse leakage current of the transistor when connected in CB configuration is 0.2 μA and it is 18 μA when the same transistor is connected in CE configuration. The value of α and β of the transistor for a base current of 30 mA will be respectively

Solution:


QUESTION: 6

The value of Vc for the transistor shown in figure below is

Solution:


QUESTION: 7

Match List-I (Transistor configuration) with List-ll (Applications) and select the correct answer using the codes given below the lists:
List-I
A. Common emitter
B. Common base
C. Common collector

List-ll
1. For impedance matching
2. For high frequency circuits
3. For audio frequency circuits

Solution:
QUESTION: 8

Assertion (A): the dependency of base width on collector to emitter voltage is known as the “Early effect”.
Reason (R): Due to “Early effect”, α of the .transistor is increased by a larger value while maintaining a constant value of β.

Solution:


QUESTION: 9

In forward mode n-p-n BJT, if we increase the voltage Vcc, the collector current increases

Solution:
QUESTION: 10

An emitter follower has high input impendance because

Solution:
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