Unformatted text preview: a carrying a uniform current of density j . Calculate the magnitude and direction of the Poynting vector at the surface of the wire. 3. Consider an infinite parallelplate capacitor, with the lower plate at z= d/2 carrying the charge density – σ, and the upper plate at z= +d/2 carrying the charge density +σ. a. Determine all nine elements of the stress tensor, in the region between the plates and show your answer in form of a matrix. b. Using the stress tensor, calculate the force per unit area on the top plate. 4. Using Maxwell’s stress tensor, determine the net force on the upper hemisphere of a uniformly charged solid sphere of radius R and charge Q....
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 Spring '11
 Kutter
 Resistance, Force, Work, Magnetic Field, Electric charge, Fundamental physics concepts, stress tensor

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