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Pune University - Sem - II : Electrodynamics, April 2010 (Old Course)

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Total No. of Questions : 7] [Total No. of Pages : 3 P874 [3722]-21 M. Sc. PHYSICS PHY UT - 601 : Electrodynamics (Old Course) (2005 Pattern) (Sem. - II) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates : 1) Question No. 1 is compulsory. Attempt any four questions from the remaining. 2) Draw neat labelled diagrams wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables and calculator is allowed. Q1) Attempt any four of the following : a) Calculate the frequency at which the skin-depth in sea water is 1m. Given : = 0 = 4 10 7 Wb/A-m and b = 4.3 b) mho . m [4] If the average distance between the sun and earth is 1.5 1011 m, find the average solar energy incident on the earth. Given P = 3.8 1026W. [4] c) Find the velocity at which the mass of the particle is double it s rest mass. Given C = 3 108 m/s. [4] d) Given the e.m. wave E = i E 0 cos w z t + jE 0 sin w z t , [4] where E0 is constant. Find the corresponding magnetic field. ( ) e) Write Maxwell s equation in differential and integral forms. [4] f) Write and explain the expression for force describing magnetic interaction between two current loops. [4] Q2) a) Obtain Faraday s law of induction for a stationary medium. Hence show that for moving medium it is expressed as - & ( ) & & B , where E is the field observed by a moving E u B = t & [8] observer and u is the velocity of the motion of the medium. & & ( && ) P.T.O.

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Additional Info : M.Sc. PHYSICS, PHY UT - 601 : Electrodynamics (Old Course) (2005 Pattern) (Semister - II), Pune University
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