التصنيف: علــوم وتقنيــات Sciences Technique

Technical Publications | ISBN: 8184316941 | 2022 | PDF | 625 pages | 30 MB

1. GENERAL:
Concept of e.m.f., p,d.; and Current Resistance; Effect of Temperature on Resistance. Resistance temperature Coefficient; Insulation Resistance; S.I. Units of Work; Power and Energy Conversion of Energy from One Form to Another in Electrical; Mechanical and Thermal Systems. Batteries and Cells; Their Types; Current Capacity and Cell Ratings; Charging and Discharging of Batteries; Series and Parallel Battery Connections; Maintenance Procedure

2. D.C. CIRCUITS :
Classification of Electric Networks; Ohm’s Law; Kirchhoff’s Laws and Their Applications for Networks Solutions Simplification of Networks Using Series and Parallel Combinations and Star-Delta Transformation; Superposition Theorem; Thevenin’s Theorem; Norton’s Theorem and Maximum Power Transfer Theorem

3. ELECTROMAGNETISM :
Magnetic Effect of Electric Current; Cross and Dot Convention; Right Hand Thumb Rule and Cork Screw Rule. Nature of Magnetic Field of a Long Straight Conductor; Solenoid and Toroid. Concept of m m f.. Flux; Flux Density; Reluctance; Permeability and Field Strength; Their Units and Relationships; Simple Series and Simple Parallel Magnetic Circuits. Comparison of Electric and Magnetic Circuits. Force on a Current Carrying Conductor Placed in a Magnetic Field. Fleming’s Left Hand Rule; Force Between two Long Parallel Current Carrying Conductors Placed in Vacuum; Definition of Unit of Ampere; Electromagnetic Induction : Faraday’s Laws of Electromagnetic Induction; Statically and Dynamically Induced e.m.f; Self and Mutual Inductance; Coefficient of Coupling Energy Stored in Magnetic Field. Descriptive Treatment of B-H Curve; Hysteresis Loop; Hysteresis Loss and Eddy Current Loss

4. ELECTROSTATICS AND A.C. FUNDAMENTALS :
A. Electrostatic Field; Electric Flux Density; Electric Field Strength; Absolute Permittivity; Relative Permittivity; Dielectric Strength; Capacitance and Capacitor. Composite Dielectric Capacitors. Capacitors in Series and Parallel. Energy Stored in a Capacitor. Charging and Discharging of Capacitor and Time Constant

B. Sinusoidal Voltages and Currents; Their Mathematical and Graphical Representation. Concept of Instantaneous; Peak; Average and r.m.s; Values; Cycle; Period; Frequency; Peak Factor and Form Factor; Phase Difference. Phasor Representation and Indication of Phase Difference in it Rectangular and Polar Representation Phasors

5. SINGLE PHASE A.C. CIRCUITS :
Study of A.C. Circuits Consisting of Purely Resistive; Purely Inductive; Purely Capacitive Type and Corresponding Voltage-Current Phasor Diagram Concept of Reactance. Study of Series and Parallel Circuits Consisting of Resistance; Inductance and Capacitance; Combinations to Develop the Concepts of Impedance; Admittance; Conductance; Susceptance and Relevant Voltage-Current Phasor Diagram. Resonance in Series R-L-C Circuit and Parallel R-L-C Circuit; Concept of Volt-Ampere; Power Factor and Power

6. POLYPHASE A.C. CIRCUITS AND SINGLE PHASE TRANSFORMERS :
A. Polyphase A. C Circuits : Concepts of Three-Phase Supply and Phase Sequence. Current and Power Relation in Three Phase Balanced Star and Delta-Connected Loads Along With the Phasor Diagrams

B. Single Phase Transformers : Construction; Principle of Working; e.m.f. Equation; Voltage and Current Ratios. Losses; Definition of Regulation and Efficiency. Determination of These by Direct Loading Method. (Descriptive Treatment of Autotransformers and Dimmerstats