๐Ÿ“š BEE โ€“ Most Important Topics

Basic Electrical Engineering ยท GTU Exam Focus ยท Student Sathidar

๐ŸŽฏ 97/119 marks (Summer 2022) from these topics
Chapter 1

โšก DC Circuits

Theory Kirchhoff's Current Law (KCL) & Voltage Law (KVL) Q.1-b [4 marks]

Theory Star-Delta Transformation โ€” Relation between star and delta networks.

Theory Superposition Theorem โ€” Theory and numerical. Q.2-a [3 marks]

Theory Thevenin's Theorem โ€” Theory and numerical.

Theory Norton's Theorem โ€” Theory and numerical. Q.2-b [4 marks]

Theory Time-Domain Analysis โ€” First-order RL and RC circuits. Q.2-c [7 marks]

Theory Important Definitions:

Waveform โ€” Shape of signal
Cycle โ€” One complete repetition
Instantaneous value โ€” Value at any instant
Peak / Crest / Maximum value โ€” Maximum amplitude
Average value โ€” Mean over one cycle
RMS value โ€” Root mean square value
Frequency โ€” Cycles per second (Hz)
Time period โ€” Time for one cycle
Power factor โ€” cos ฯ†
Active power โ€” P = VI cos ฯ†
Reactive power โ€” Q = VI sin ฯ†
Apparent power โ€” S = VI
Peak / Crest factor โ€” Peak / RMS
Form factor โ€” RMS / Average
Phase difference โ€” Phase angle between V & I
Q.1-c [7 marks] ยท Q.3-b [4 marks]
Chapter 2

๐ŸŒ€ AC Circuits

Theory Definitions:

Phase voltage โ€” Voltage across each phase
Line voltage โ€” Voltage between lines
Phase current โ€” Current through each phase
Line current โ€” Current through each line
Phase sequence โ€” Order of phase voltages
Balanced / Unbalanced system โ€” Equal / Unequal phase voltages
Balanced / Unbalanced load โ€” Equal / Unequal impedances

Theory Relation between Line & Phase Quantities

โ€ข Balanced Star Connection: VL = โˆš3 ร— Vph  |  IL = Iph
โ€ข Balanced Delta Connection: VL = Vph  |  IL = โˆš3 ร— Iph
Q.3-c [7 marks]

Theory Two Wattmeter Method โ€” Measurement of power in balanced three-phase circuit. Q.3-a [3 marks]

Chapter 3

๐Ÿ”‹ Transformers

Theory B-H Curve & Magnetic Hysteresis โ€” of magnetic materials.

Theory Single-Phase Transformer โ€” Construction & working.

Theory EMF Equation โ€” E = 4.44 ร— f ร— ฯ†m ร— N Q.4-a [3 marks]

Theory Core Type vs Shell Type โ€” Construction differences.

Theory Three-Phase Transformer Connections โ€” Types & applications.

Theory Auto-Transformer โ€” Construction, working & applications. Q.4-a [3 marks]

Chapter 4

โš™๏ธ Electrical Machines

Theory Rotating Magnetic Field โ€” Concept & generation.

Theory Squirrel-Cage Induction Motor โ€” Construction & working. Q.4-b [4 marks]

Theory Slip-Ring Induction Motor โ€” Construction & working. Q.4-b [4 marks]

Theory Single-Phase Induction Motor โ€” Types & working.

Theory Parts of DC Motor โ€” Armature, field, commutator, brushes, etc.

Theory Separately Excited DC Motor โ€” Characteristics & working.

Theory Alternator / Synchronous Generator โ€” Construction & working. Q.4-c [7 marks]

Chapter 5

๐Ÿ”Œ Electrical Installations

Theory Fuse โ€” Working & types. Q.5-a [3 marks]

Theory Miniature Circuit Breaker (MCB) โ€” Working & applications. Q.5-a [3 marks]

Theory Earth Leakage Circuit Breaker (ELCB) โ€” Working & types.

Theory Cables โ€” Classification & construction.

Theory Types of Earthing โ€” Plate, pipe, strip, etc.

Theory Lead Acid Battery โ€” Construction, working & applications.

Num Calculation of Energy โ€” Energy = Power ร— Time (kWh). Q.5-c [7 marks]

Num Power Factor โ€” cos ฯ† = P / S. Q.5-c [7 marks]

โญ

๐Ÿงฎ Important Numerical

Imp Wheatstone Bridge โ€” For the Wheatstone bridge diagram shown in Figure, obtain the current flowing through the 20ฮฉ resistance using Thevenin's equivalent network. GTU Summer 2020 ยท Q.2-c [7 marks]

โšก Student Sathidar ยท BEE Most Important Topics ยท All Chapters Covered
Stay Connected. Stay Inspired.