About this previous year paper
This is the official B.Tech 1st Semester (AKTU) Theory Examination 2020–21 Question Paper for the subject Emerging Domain in Electronics Engineering (Subject Code: KEC101T). It is a full 100-mark, 3-hour university exam paper designed to test a student’s fundamental and applied understanding of electronics, semiconductor devices, digital circuits, communication systems, IoT, MOSFETs, OPAMPs, rectifiers, logic gates, boolean algebra, and emerging technologies in electronics.
This paper follows the complete AKTU exam structure and is extremely helpful for students preparing for semester exams, internal assessments, competitive exams, and revision of first-year electronics concepts.
Detailed Breakdown of the Question Paper
SECTION A – Very Short Answer Questions (10×2 = 20 Marks)
This section contains 10 short questions, ideal for quick revision of core concepts. Topics include:
Doping in semiconductors & its importance
Advantages of modulation
Number system conversion
VI characteristics of ideal diode
Microprocessor vs microcontroller
Bridge rectifier vs center-tapped rectifier
FET vs BJT differences
Avalanche vs zener breakdown
1’s and 2’s complement
Bluetooth vs Wi-Fi
These questions test basic understanding of electronics and communication fundamentals.
SECTION B – Short Answer / Numerical Questions (3×10 = 30 Marks)
Students must attempt any 3 out of 5 questions. Topics include:
Working of full-wave bridge rectifier + ripple factor
Voltage doubler circuit + varactor diode
Zener diode current calculation
Liquid crystal displays (LCDs) + waveform analysis
Output waveform analysis + transistor amplification relationships
This section includes both numerical and descriptive questions, ideal for mid-level practice.
SECTION C – Long Answer & Applied Questions (5×10 = 50 Marks)
Students must attempt one part from each question. Each part focuses on detailed explanations, circuit diagrams, characteristics, and derivations.
Question 3 – BJT & MOSFET
NPN transistor construction + CE configuration characteristics
OR
Enhancement vs depletion MOSFET + construction + characteristics
Question 4 – OPAMP & IoT
OPAMP block diagram + ideal characteristics + differentiator circuit
OR
IoT concept + components + definitions of CMRR & PIV
Question 5 – Boolean Algebra & K-map
Simplification using K-map + logic implementation
OR
Boolean conversions (Sum → Product), binary/decimal/octal/hex conversions
Question 6 – Communication Systems
Amplitude modulation + waveforms + carrier power calculation
OR
Satellite communication + CDMA vs GSM
Question 7 – Logic Gates & Circuits
Universal gates + XOR using NAND
OR
Output analysis of given logic circuits
This section builds deep understanding of electronics engineering principles and problem-solving.