PHYSICS PAPER -III (HONOURS)
This paper will be of 75 marks. Question 1 will contain ten objective questions and it will compulsory. Four questions are to be set from Group A and GROUP- B each. The candidate's will be required to answer two questions from each Group. The questions will be of equal value.
GROUP-(Mathematics physics and relativity): Set 4 questions.
Curviliner co-ordinates, cartesian, spherical polar and cylindrical co-ordinates, Orthogonal transformation of co-ordinates. Scalar and vector quantities. Divergence and Curl. Line, Surface and volume integrals.
Theorems of Gauss an Stokes.
Partial differential equation and its solution by separation of variables.
Laplace equation and its solution Poisson's equation,
Galiyan transformation. Inertial frame of reference Michelson - Morley experiment. Lorentz Fitzerald contraction. Einstein's postulates. Lorentz transformation and Its consequences, length. contraction and time dilation, Addition of velocities Dragging of light by moving medium. Relativistic Doppler
effect for propagation of light waves. Aberration of light. Variation of mass With velocity, mass energy relation. Relativistic formula for momentum and energy.
GROUP-B (Electronics): Set 4 questions.
Basic circuit analysis:
Circuit models, Kirchoff's law single equation loops, single mode pan circuit, voltage and current divider rules, principle of Superposition. Thevenin's and Nortan's theorems, two-post analysis of an electrical network.
Semiconductor diodes :
p-n junction diode, I-V characteristics, Schockley model, application in rectifiers, clippers and limiters, Zener diode and its applications, optoelectronic diodes, LED, photodiodes, optocouplers.
Bipolar Junction transistors (BJT):
pnp and npn structure, active and
Saturation regions, characteristics of BJT, common emitter configuration
input and output characteristics, B-parameter, common- base configuration,Output characteristics, Two post analysis of a transistor, definition of
parameters, loadline common base configuration concept, emitter follower, biasing methods stability factor, low frequency model
Field effect transistor (FET): Classification of various types of FEF constructional details of junction field effect transistor, chain characteristics
of JFET, biasing of JFET, operating regions, pinch off voltage, idea of metal Oxide semiconductor (MOS) transister.
Amplifiers :
Frequency response of amplifiers, LC and CR response,
bandwidth and rise time, amplifier, flat band equivalent circuits with and
without input and output loading. Casoade connections, Decibel power, gain and loss, Conversion to voltage and Current gain, Bode's Plots.
Oscillators and wave:
From generators positive feed back, Barkhausen criterion, RC oscillator, wien Bridge Oscillator, phase shift oscillator, colpitts Oscillator, Hartley Oscillator, operational amplifier, square wave generator, calculations of frequency and amplitude of oscillator, unijunction Oscillator.
Digital circuits:
Binary system, Boolean algebra, AND, OR, NAND NOR
gates, TTL logic families, NMOS and CMOS circuits, ECL gates, binary
address, Arithmetic function circuits digital comparator/decoder, demultiplexer data selector, encoders, ROM, address in of ROM, PROM, EROM, SR, JK Flip-flops, ripple counters, synchronous concentres, elements of MP, CPU
busses, 1/OS, memories
PHYSICS PAPER - IV (HONOURS)
This paper will be of 75 marks Question's 1will contain ten objective questions and it will be compulsory. Four questions are to be set from Group A and Group B each. The Candidate's will be required to answer two questions
from each Group. The question will be of equal value.
GROUP-A
(Current Electricity and Atomic Physics) Set 4 questions
Current Electricity Thermodynamic treatment of seeback, Peltier and Thomson effect and their applications Self inductance and mutual inductance Growth and decay of current in circuits containing LC and R. Simple applications of these circuits Moving coil galvanometer- a periodic and ballistic galvanometers. A. C. andAC. circuits use of vectors and complex numbers in A. C. Circuit theory Series and parallels resonant circuits. Power in A. C. circuits, Wattweter A. C. Bridge (I) De Sauty's bridge (ii) Anderson'sBridge (iii) Carey Foster's bridge (v) Schering bridge Three phase A . C systems Mutually coupled circuits. Rotating magnetic fields. polyphase and
Single phase induction motors. Transformers - equivalent circuit and vector diagram iron copper losses in Transformers.
Photoelectric Effect:
Einstein's photoelectric equation photoelectric,photoconductive and photovoltaic cells. Compton effect, Bragg's law and determination of X-ray wavelength.
Atomic Physic :
Back ground from quantum theory the four quantum numbers Spectral terms arising from L S. coupling. S. p. d, f rotation, selection rules, Half life of excited states, width of a spectral line. spectra of mono and
divalent atoms. Doublet fire structure of hydrogen lines, screening constants for monovalent atoms, series limits, doublet structure of alkali spectrum Spectra ot helium and alkaline earth atoms, Singlet and triplet series.
Effect of magnetic field on energy levels, Gyromagnetic rotation of orbital and spin motions, vector model, Landeg factor, strong and weak field effects,illustrative cases of H, Na, and Hg.
X-ray spectra :
The continuum X-ray spectrum, Duane and Hunt limit characteristic X-ray: Moseley's law, doublet fine structure. H-like character of X-
ray states X-ray absorption spectra, absorption edges
GROUP-B
(Molecular Physics and classical electrodynamics) Set 4 Questions
Molecular Physics
Sharing of electrons, formation of molecular orbitals, H2+ ion, H2 molecular, electronic levels, singlet and triplet characters .Rotational energy levels, internuclear distance. Vibrational energy levels
force constants. Anharmoncity dissociation energy isotope effects on rotational and vibration energies
Spectra of diatomic molecular : Pure rotation spectra selection rules.
Vibration-rotation spectra selection rules, PO. and R branches. Electronic band systems, sequences and progressions. Franck Condon Principle.
Triatomic and Complex molecules:
Normal modes of a triatomic molecule: selection rules for infrared absorption, molecular orbitals in
complex molecules. approximation for treating H.O.C. vibrations relative torest of the molecule.
Raman effect: Raman shifts, stokes and anti stokes lines, selection rules in Raman versus IF Spectra.
Classical Electrodynamics:
Time dependent fields and Maxwell's equation; Motion of charged particles in E and B fields. Case of cathode ray Oscillograph. positive ray parabola, velocity spectro, Magnetic focussing cyclotron and betatron. mass spectrography.
Maxwell's equation for time dependent electromagnetic field in vaccum and in material media, boundary conditions.
Electromagnetic potentials. Magnetic vector potential A and scalar potential . Poission's equation for A in terms of current density, solutions for line and surface currents, coulomb and Lorentz gauge transformation, Lorentz law in terms of potentials.
Electromagnetic Waves:
Maxwell's equations and electromagnetic waves, plane-wave solution for Maxwell's equations, Orthogonality of E,B and propagation vector Poynting vector, energy and momentum propagation. reflection and transmission at dielectric boundaries, normal incidence, oblige
inciduce. polarisation by refrection Blewster's angle.
Electromagnetic waves in conductors:
Modified field equation
attenuation of the wave, reflection at and transmission through a conducting surface.
Radiation from accelerated charges : Modification of coulomb's law to
include velocity and acceleration dependent terms in E field. Radiation from an oscillating dipole and its polarisation concept of retarded potentials
PRACTICAL PAPER
Time: 6 Hours]
[Full Marks :50
The course shall include the following experiments
1. Refractive index by spectrometer.
2. Calibration of prism spectrometer
3 Determination of Cauchy's constant
4. Wavelength by plane transmission grating and identification of gas
in a discharge tube.
5 Determination of Rydberg's constant.
6 Wavelength by Newton's ring.
7.Wavelength by biprism.
8. Resolving power of telescope.
9. Magnifying powers of telescope and microscope cg
10. Specific rotation by polarimeter.
11. Angle of dip by dip circle and Earth inductor.
12. Hysterisis loop of a rod shaped specimen
13. Measurement of magnetic field with a search coil
14. Calibration ot Ammeter and voltmeter by potentiometer
15. B. G. Constant and log decrement.
16. Figure of merit of a moving coil galbanometers
17, Measurement ot low and high resistances.
18. Temperature variation of electrical resistance
19. Temperature Variation of e.m.f.of thermocouple
20. Use of oscilloscope to measure voltage, Current, frequency and
phase.
21. Study of series and parallel resonance circuits.
22. Capacitance by De-Sauty s bridge.
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