Physics (Paper- 1) Electromagnetic Theory (विद्युत चुम्बकीय सिद्धांत) B.Sc. 3rd Sem

Unit ¼bdkbZ½

Topics ¼fo"k;½

No. of

Lectures ¼O;k[;ku dh la[;k½

PART A

Electromagnetic Theory ¼fo|qr pqEcdh; fl)kar½

I

Electrostatics

¼fo|qr LFkSfrdh½

Electric charge & charge densities, electric force between two charges. General expression for Electric field in terms of volume charge density (divergence & curl of Electric field), general expression for Electric potential in terms of volume charge density and Gauss law (applications included). Study of electric dipole. Electric fields in matter, polarization, auxiliary field D (Electric displacement), electric susceptibility and permittivity. ¼fo|qr vkos'k vkSj vkos'k ?kuRo] nks vkos'kksa ds chp fo|qr cyA vk;ru vkos'k ?kuRo ¼fo|qr {ks= dk fopyu vkSj dyZ½ ds lanHkZ esa fo|qr {ks= ds fy, lkekU; O;atd] vk;ru vkos'k ?kuRo vkSj x‚l fu;e ¼vuqç;ksx lekfo"V ½ ds lanHkZ esa fo|qr {kerk ds fy, lkekU; O;atdA fo|qr f}èkzqo dk vè;;uA inkFkZ esa fo|qr {ks=] èkzqohdj.k] lgk;d {ks= D ¼fo|qr foLFkkiu½] fo|qr ço`fr vkSj ijkoS|qrkadA½

(08)

II

Magnetostatics

¼fLFkj pqEcdh;½

Electric current & current densities, magnetic force between two current elements. General expression for Magnetic field in terms of volume current density (divergence and curl of Magnetic field), General expression for Magnetic potential in terms of volume current density and Ampere’s circuital law (applications included). Study of magnetic dipole (Gilbert & Ampere model). Magnetic fields in matter, magnetisation, auxiliary field H, magnetic susceptibility and permeability. ¼fo|qr çokg vkSj /kkjk ?kuRo] nks /kkjk ?kVdksa ds chp pqacdh; cyA vk;ru /kkjk ?kuRo ds lanHkZ esa pqEcdh; {ks= ds fy, lkekU; O;atd ¼pqacdh; {ks= dk fopyu vkSj dyZ½] vk;ru /kkjk ?kuRo ds lanHkZ esa pqEcdh; foHko ds fy, lkekU; O;atd vkSj ,Eih;j ifjiFkh; fu;e ¼vuqç;ksx lekfo"V gSa½A pqacdh; f}èkzqo dk vè;;u ¼fxYcVZ vkSj ,Eih;j e‚My½A inkFkZ esa pqacdh; {ks=] pqEcdRo] lgk;d {ks= H] pqacdh; ço`fr vkSj pqEcd'khyrkA½

(08)

III

Time Varying Electromagnetic Fields

¼le; ifjorhZ fo|qrpqacdh; {ks=½

Faraday's laws of electromagnetic induction and Lenz's law. Displacement current, equation of continuity and Maxwell-Ampere’s circuital law. Self and mutual induction (applications included). Derivation and physical significance of Maxwell’s equations. Theory and working of moving coil ballistic galvanometer (applications included). ¼QSjkMs ds fo|qr pqEcdh; çsj.k ds fu;e vkSj ysUt+ dk fu;eA foLFkkiu èkkjk] lkarR; dk lehdj.k vkSj eSDlosy&,Eih;j dk ifjiFk fu;eA Lo vkSj vU;ksU; çsj.k ¼vuqç;ksx lekfo"V½A eSDlosy ds lehdj.kksa dh O;qRifÙk vkSj HkkSfrd egRoA Pky dqaMyh çk{ksfid /kkjkekih dk fl)kar vkSj dk;Z ¼vuqç;ksx lekfo"V ½A½

(07)

IV

Electromagnetic Waves

¼fo|qrpqEcdh; rjaxsa½

Electromagnetic energy density and Poynting vector. Plane electromagnetic waves in linear infinite dielectrics, homogeneous & inhomogeneous plane waves and dispersive & non-dispersive media. Reflection and refraction of homogeneous plane electromagnetic waves, law of reflection, Snell’s law, Fresnel’s formulae (only for normal incidence & optical frequencies) and Stoke’s law. ¼fo|qrpqacdh; ÅtkZ ?kuRo vkSj IokbfUVax lfn’kA jSf[kd vuar ijkoS|qfrdh esa lery fo|qRkpqEcdh; rjax  ] lekaxh vkSj vlekaxh lery rjxsa vkSj ifj{ksih vkSj vifj{ksih ek/;eA lekaxh lery fo|qrpqacdh; rjaxksa dk ijkorZu vkSj viorZu] ijkorZu dk fu;e] Lusy dk fu;e] Ýsusy dk lw= ¼dsoy vfHkyac vkiru vkSj izdkf’kd vko`fÙk;ksa ds fy,½ vkSj LVksd dk fu;eA½

(07)