FOURTH SEMESTER PHYSICS
ELECTRICITY, MAGNETISM AND ELECTRONICS
UNIT-I
1. Electrostatics: Gauss’s law-Statement and its proof, Electric field intensity due to (i) uniformly charged Non-Conducting solid sphere and (ii) an infinite conducting sheet of charge, Deduction of Coulomb’s law from Gauss law, Electrical potential–Equipotential surfaces, Potential due to a (i) dipole (ii) charged spherical shell
2.Dielectrics: Dielectrics-Polar and Non-polar dielectrics- Effect of electric field on dielectrics,Dielectric strength, Capacitance of a parallel plate condenser with dielectric slab between the plates, Electric displacement D, electric polarization P,Relation between D, E and P, Dielectric constant and electric susceptibility.
UNIT-II
3. Magnetostatics: Biot-Savant's law and its applications: (i) circular loop and (ii) solenoid, Divergence and curl of magnetic field, Ampere’s Circuital Law and its application to Solenoid, Hall effect, determination of Hall coefficient and applications.
4.Electromagnetic Induction: Faraday’s laws of electromagnetic induction, Lenz’s law,Self induction and Mutual induction, Self inductance of a long solenoid, Mutual inductance of two coils, Energy stored in magnetic field, Eddy currents and Electromagnetic damping
UNIT-III
5.Alternating currents: Alternating current - Relation between current and voltage in LR and CR circuits,Phasor and Vector diagrams, LCR series and parallel resonant circuit, Q –factor, Power in ac circuits, Power factor.
6. Electromagnetic waves-Maxwell’s equations: (6 hrs) Idea of displacement current, Maxwell’s equations-Derivation, from integral to differential Maxwell’s wave equation (with derivation), Transverse nature of electromagnetic waves, Poynting theorem (Statement and proof)
UNIT-IV
7. Basic Electronic devices: PN junction diode, Zener diode and Light Emitting Diode (LED) and their I-V characteristics, Zener diode as a regulator- Transistors and its operation, CB, CE and CC configurations, , Relation between alpha, beta and gamma; Input and output characteristics of a transistor in CE mode Hybrid parameters, Determination of hybrid parameters from transistor characteristics; Transistor as an amplifier.
UNIT-V:
8. Digital Electronics: Number systems, Conversion of binary to decimal system and vice versa, Binary addition & Binary subtraction (1’s and 2’s complement methods), Laws of Boolean algebra, Basic logic gates DeMorgan’s laws-Statements and Proofs, NAND and NOR as universal gates, Exclusive-OR gate, Half adder and Full adder circuits.