UNIVERSITY OF MADRAS
B.Sc. DEGREE COURSE IN ELECTRONICS SCIENCE
SEMESTER SYSTEM WITH CREDITS
(Effective from the Academic Year 2003-2004)

Semester I - Main Paper I - Electricity and Basic Electronics

Duration: 3 hrs
Maximum Marks: 100
Credits: 4

Unit-1

Electrostatics : Permittivity of free space - Relative permittivity - Electric intensity - Intensity due to a point charge - Electric potential - Relation between potential and intensity - Potential due to a uniformly charged spherical conductor - Electric dipole - dipole moment - Potential and intensity due to a dipole - couple on a dipole in an electric field - Electrical images - Its applications - Normal electric Induction - Gauss theorem and Applications - Electric intensity due to a uniformly charged sphere, infinite cylinder and plane sheet of charge - Intensity and stress on a charged conductor - Electrified soap bubble - Potential energy stored in unit volume in a medium surrounding a charged body.

Unit-2

Capacitors Unit of capacity - The Farad - Capacity of spherical, parallel plate and Cylindrical capacitors - Effect of dielectric on capacity - Energy of a charged capacitor - change in the energy of a parallel plate capacitor on introduction of dielectric slab - Loss of energy on sharing of charges - Force of attraction between the plates of charged capacitor - Guard ring capacitor - Attracted disc electrometer - measurement of potential and dielectric constant - Quadrant electrometer - Measurement of Ionisation current and dielectric constant.

Unit-3

Magnetic Effects of Current : Biot-Savart's Law - Lorentz Force - Force between two current carrying infinitely long parallel conductors - Definition of ampere and the value of permeability of free space - Force between coaxial coils - Ampere balance.
Current Electricity:
EMF and Internal resistance of a cell - Cells connected in series and in parallel - Carey-Foster bridge - Potentiometer - Calibration of ammeter, high and low range Voltmeter, comparison of resistances.

Unit-4

Diode circuits and Power supplies : Junction diode characteristics - Half and frill wave rectifiers - expression for efficiency and ripple factor - Construction of low range power pack using diodes - Bridge rectifier - Filter circuits - Zener diode - characteristics - voltage regulation using Zener diode - regulated power supply - clipper and damper using diodes.

Unit-5

Transistor circuits : Characteristics of a transistor in CB,CE and CC modes - relative merits - Graphical analysis in CE configuration - Transistor as an amplifier - Single stage amplifier - Frequency response - Norton' s-Thevenin's Theorems - h parameters. Basic logic gates AND, OR and NOT - Construction of Basic logic gates using Diodes and Transistors.

Differentiator and Integrator using capacitor and resistor.

Books for Study and Reference

1. Electricity and magnetism - Sehgal and Chopra
2. Electricity and magnetism - M. Narayanamoorthi and Others
3. Principles of Electronics - V.K. Mehta, S.Chand & Co. VI Edition 2001
4. Basic Electronics - B.L. Theraja, S.Chand & Co. IV Edition 2001
5. Elements of Electronics - Bagde and Singh
6. Fundamentals of Physics, 6^th Edition, by D.Halliday, R.Resnick and J.Walker, Wiley, NY, 2001.
7. Physics, 4^th Edition, Vols 1, 2 & 2 Extended by D.Halliday, R.Resnick and K.S.Krane, Wiley, NY, 1994.
8. CRC Handbook of Physics & Chemistry, 80^th Ed., CRS Press, NY, 1999.
9. The Feynman Lectures on Physics, Vols. 1, 2, and 3, by R. P. Feynman, RB Leighton and M Sands, Narosa, New Delhi, 1998.
10. Basic Electronics, 6^th Edition by B. Grob, McGraw- Hill, NY, 1989.