BE3251 Basic Electrical and Electronics Engineering Previous Year Question Papers - Anna University

UNIT 1 – Electrical Circuits

Part A

• State Ohm's Law, KVL, KCL
• Define RMS and Average values

Part B

• Solve circuits using Mesh and Nodal analysis
• Analyze RLC circuits and resonance condition
• Derive RMS, Average value and Power factor

UNIT 2 – Electrical Machines

Part A

• Define Back EMF
• Condition for maximum efficiency of transformer

Part B

• Explain DC generator (construction, working, EMF equation)
• Explain DC motor (working and torque equation)
• Explain transformer and induction motor operation

UNIT 3 – Analog Electronics

Part A

• Intrinsic vs Extrinsic semiconductors
• Define knee voltage

Part B

• Explain V-I characteristics of PN and Zener diode
• Explain BJT (CE configuration characteristics)
• Explain full-wave rectifier and ripple factor

UNIT 4 – Digital Electronics

Part A

• Define SOP and POS forms
• Number system conversions

Part B

• Solve K-Map (3 & 4 variables)
• Explain error detection (Hamming code)
• Explain binary ripple counter

UNIT 5 – Measurements & Instrumentation

Part A

• Functional elements of measurement system
• PMMC vs Moving Iron

Part B

• Explain PMMC and Moving Iron instruments
• Explain two-wattmeter method
• Explain DSO (block diagram & working)

Most Repeated / High-Weight Questions

Circuit analysis using mesh and nodal methods, RLC resonance, DC machines, transformer operation, semiconductor characteristics, K-map simplification, digital logic design, measurement instruments.