A Textbook Of Electrical Technology Volume 1 By B.L. Theraja And A.K. Theraja

electrical technology

Download Free A Textbook Of Electrical Technology Volume 1 Pdf

Introduction: A Textbook Of Electrical Technology Pdf

Download Free A Textbook Of Electrical Technology Pdf Volume 1, Suppose that in a conductor, the number of free electrons available per m3 of the conductor material is n and let their axial drift velocity be ν meters/second. In time dt, distance traveled would be ν × dt. If A is an area of the cross-section of the conductor, then the volume is νAdt and the number of electrons contained in this volume is νA dt. Obviously, all these electrons will cross the conductor cross-section in time dt. If e is the charge of each electron, then total charge which crosses the section in time dt is dq = nAeν dt. Since current is the rate of flow of charge, it is given as i = dq nAe dt
dt dt
ν = ∴ i = nAeν
Current density, J = i/A = ne ν ampere/metre2
Assuming a normal current density J = 1.55 × 106
A/m2
n = 1029 for a copper conductor
and e = 1.6 × 10−19 coulomb, we get
1.55 × 106 = 1029 × 1.6 × 10−19 × ν ∴ν = 9.7 × 10−5
m/s = 0.58 cm/min
It is seen that contrary to the common but mistaken view, the electron drift velocity is rather very slow and is independent of the current flowing and the area of the conductor.

Download Free A Textbook Of Electrical Technology Volume 1 Pdf Chapters

Table Of Contents For A Textbook Of Electrical Technology Pdf

1. Electric Current and Ohm’s Law

2. DC Network Theorems

3. Work, Power, and Energy

4. Electrostatics

5. Capacitance

6. Magnetism and Electromagnetism

7. Electromagnetic Induction

8. Magnetic Hysteresis

9. Electrochemical Power Sources

10. Electrical Instruments and Measurements

11. A.C. Fundamentals

12. Complex Numbers

13. Series A.C. Circuits

14. Parallel A.C. Circuits

15. A.C. Network Analysis

16. A.C. Bridges

17. A.C. Filter Networks

18. Circle Diagrams

19. Polyphase Circuits

20. Harmonics

21. Fourier Series

22. Transients

23. Symmetrical Components

24. Introduction to Electrical Energy Generation

Indian Scenario

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