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Pune University - Sem - II : Electrodynamics, April 2010

3 pages, 20 questions, 1 questions with responses, 1 total responses,    0    0
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Total No. of Questions : 7] P884 [Total No. of Pages : 3 [3722]-201 M. Sc. PHYSICS PHY UTN - 601 : Electrodynamics (New Course) (2008 Pattern) (Sem. - II) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates : 1) Question No. 1 is compulsory and solve any four questions from the remaining. 2) Draw neat labelled diagram wherever necessary. 3) Figures to the right indicates full marks. 4) Use of logarithmic tables and pocket calculator is allowed. Q1) Attempt any four of the following : a) Calculate the intrinsic impedance of an e.m. wave travelling through free space. Given for free space : ~ 0 = 4 10 7 Wb/A-m and = 0 = 8.85 10 12 C2/N-m2. [4] b) Find the ratio of skin depth in copper at 1KHz to that at 100 MHz. [4] c) Two identical bodies move towards each other, the speed of each being 0.9C. Find their speed to each other. [4] d) Calculate the magnitude of Poynting s vector at the surface of the sun. Given : Power radiated by sun is 3.8 1026 Watt and radius of the sun is 7 108 m. [4] e) Calculate the rest mass energy of an electron in eV if it s rest mass is equal to 9.1 10 31 kg. [4] f) Show that the ratio of electrostatic and magnetostatic energy densities ue um is equal to unity. [4] P.T.O.

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Additional Info : M.Sc. PHYSICS, PHY UTN - 601 : Electronics (New Course) (2008 Pattern) (Semister - II), Pune University
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