THEORY EXAMINATION (SEM–II) 2016-17 ELECTRONICS ENGINEERING

This question paper is for Electronics / ECE students, carrying 100 marks and divided into three sections. It tests understanding of semiconductors, diodes, transistors, MOSFETs, op-amps, rectifiers, and communication systems.

SECTION – A (10 × 2 = 20 Marks)

This section contains short answer questions based on:

N-type & P-type semiconductors

Diode approximation models

Effect of temperature on barrier potential

Varactor & Schottky diodes

Difference between Multimeter & CRO

BJT currents (βdc, ICBO, ICEO)

Depletion vs Enhancement MOSFET

Slew rate & Power bandwidth

Modulation index

These questions require precise definitions and small calculations.

SECTION – B (5 × 10 = 50 Marks)

This section has descriptive and circuit-based questions, including:

P-N diode VI characteristics & Zener regulator

Clipper vs Clamper with waveforms

NPN transistor construction, α–β relationship & bias analysis

MOSFET working and characteristics

Op-amp subtractor & integrator circuits

Digital Voltmeter and Digital Multimeter

CRO block diagram and working

Communication system block diagram

These require diagrams, explanations, and basic derivations.

SECTION – C (2 × 15 = 30 Marks)

This section contains long answer numerical + theoretical questions, such as:

Op-amp characteristics, offset/bias current, full-wave rectifier calculations

Important definitions (slew rate, eV, mobility, ripple factor, CMRR, pinch-off voltage, TUF)

Modulation concepts, AM vs FM

Voltage multiplier circuits

AM power calculation

These assess deep understanding and application of formulas and circuits.