About this previous year paper
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.