Electronics Questions with solutions MCQs

1. In a BJT transistor a is common base current gain and ẞ is common emitter current gain. What is relation between α and ẞ

A

α = ẞ/(1 - ẞ)

B

α = ẞ/(1 +ẞ)

C

α = ẞ/(ẞ - 1)

D

Relation between α and ẞ depends on circuit

Electronics Statistical Assistant 2025
Correct Answer : B
Explanation :

α = ẞ / (1 + ẞ)<span></span>

Correct Answered :

Wrong Answered :

2. Match the following Operation Characteristics:

Column - A (Diodes)    Column - B (Characteristics)

i) Zener Diode 1. Negative resistance region due to tunneling

ii) Tunnel Diode 2. Sharp breakdown voltage in reverse bias

iii) Schottky Diode 3. Low forward voltage drop (~0.2-0.3 V)

iv) Varactor Diode 4. Junction capacitance varies with reverse bias

Choose the correct option:


A

i-2, ii-1, iii-3, iv-4

B

i-2, ii-4, iii-1, iv-3

C

i-2, ii-4, iii-1, iv-3

D

i-4, ii-3, iii-2, iv-1

Electronics Statistical Assistant 2025
Correct Answer : A
Explanation :

i-2, ii-1, iii-3, iv-4<span></span>

Correct Answered :

Wrong Answered :

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