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Electromagnetism
Paper Code:
PHY-102
Credits:
3
Contact Hours:
45.00
Max. Marks:
100.00
Objective:
This course will acquaint the students with the scalar and vector fields, gradient, divergence, curl and their physical significance. Students will also learn about the fields produced by moving charges and magnetic fields in matter, electromagnetic induction, Maxwell’s equations and electromagnetic waves.
8.00
Unit I:
Scalar and vector fields:
Partial derivatives, Gradient of a scalar function. Line integral of a vector field, Divergence and Curl of a vector field, Physical significance of divergence & curl and their expressions in Cartesian coordinates, Gauss divergence theorem, Stokes curl theorem, Laplacian operator, Poisson’s and Laplace’s equation.
9.00
Unit II:
Dynamics of a charged particle
Magnetic forces, Invariance of charge, Electric field measured in different frames of reference, Field of a point charge moving with constant velocity, Interaction between a moving charge and other moving charges.
10.00
Unit III:
Magnetostatics:
Ampere’s law in differential form, Magnetic Vector Potential, Poisson’s equation for vector potential, magnetic field due to a current carrying wire and deduction of Biot-Savart’s law.
Electric current due to an orbiting electron, Bohr Magneton, Orbital gyro magnetic ratio, Electron spin and spin magnetic moment, magnetic susceptibility, magnetic field caused by magnetized matter, Magnetization current, Free current its H field.
9.00
Unit IV:
Electrostatics and dielectrics:
Moments of a charge distribution, Atomic and molecular dipoles, Atomic Polarizability, Permanent dipole moment, Dielectrics, capacitor filled with dielectric, the potential and field due to a polarized sphere, dielectric sphere in a uniform electric field, The electric field of charge in dielectric medium and Gauss law, Relation between electric susceptibility and atomic polarizability, Polarization due to changing electric field. The bound charge current.
9.00
Unit V:
Maxwell’s equations and electromagnetic waves:
Faraday’s laws of electromagnetic induction, its integral and differential form, Maxwell’s displacement current, Maxwell’s equations in differential and integral form.
Poynting’s theorem ,Wave equation , EM waves in a non-conducting dielectric medium, Plane monochromatic waves in a non-conducting medium, Energy flux in a plane electromagnetic wave, Radiation pressure.
Essential Readings:
1. “Electricity and Magnetism with Electronics”, K.K.Tewari, S.Chand & Co. Ltd. (2001)
2. “Electricity and Magnetism”, D.Chattopadhyay, P.C.Rakshit, New Central Book Agency (P) Ltd.
References:
1. “Elements of Electromagnetics”, Mathew, N.D. Sadika, New Delhi, Oxford University Press.
2. “Electricity and Magnetism”, W.J.Duffin , Mc Graw Hill Book Co., Fourth edition.
3. “Electromagnetics”, B.B.Laud ,New Age International Publishers, Second edition.
4. “Electromagnetic theory and electrodynamics”, Satya Prakash, Kedar Nath Ram Nath & Co. Publishers, Meerut, Ninth edition.
5. “Physics Part 2”,D.Halliday and R.Resnick, John Wiley and Sons, Inc. Newyork.
6. “Principles of Electricity and Magnetism”,S.Palit, Narosa Publishing House.
Academic Year:
