Unformatted text preview: ρ l / 2 π± ) ln ( r 2 /r 1 ). 4) In spherical coordinates, E = 2 R/ ( R 2 + a 2 ) 2 ˆ R V/m. Find the potential at any point, using the reference: a) V = 0 at inﬁnity. b) V = 0 at R = 0. c) V = 100 V at R = a . 5) A certain potential ﬁeld is given in spherical coordinates by V = V ( R/a ) sinθ . Find the total charge contained within the region R < a . 6) What is a dielectric material said to be if the direction of the electric polarization ﬁeld, P , is in the same direction of the electric ﬁeld intensity, E ? Does the electric ﬂux density D always point in the same direction as E ? Why or why not? 1...
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 Spring '08
 Joshi
 Electric Potential, Flux, Magnetic Field, Physical quantities, 30th Wednesday 5PM

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