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Unformatted text preview: (c) Evaluate the surface density of the induced charges at the point ) , , ( R . (d) For far points, how does the potential vary as a function of r (distance to the origin)? (e) For R b a 5 . 1 2 2 = + , draw the field lines qualitatively. z q r ε o ε q z x V o ε Conductor R ) , , ( b a Problem 3 In a coaxial cable the center conductor is misplaced from the center of the cable by a known amount e . According to the shown drawing, the radius of the center conductor is b while the internal radius of the cable shield is a . Determine the capacitance per unit length of the cable when the cable is filled with a dielectric having a relative permittivity of r ε . M. Shahabadi a b e r ε...
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- Spring '11
- Electromagnet, Permittivity, Fundamental physics concepts, Coaxial cable, dielectric half-space