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Unformatted text preview: ﺑﺴﻢ اﷲ اﻟﺮﲪﻦ اﻟﺮﺣﻴﻢ
Department of Electrical and Computer Engineering
Module 0404215 Electromagnetic (I) Q1 Q2 First Exam 12/12/2005 Time allowed: 1 hour →
Using the differential form of Gauss’s law ( ∇. D = ρ v ) derive in detail the integral form of
(6 points) Obtain an expression for the capacitance of the coaxial cable shown in Figure 1?
(Note that for the given voltage V acroos the capacitor , charge +Q and –Q will accumulate
on the surfaces of the outer and inner conductors, respectively) Figure 1
(5 points) Q3 Determine the electric flux density at point (4, 0 , 3) if there is a point charge -5 π mC at the
point (4, 0 , 0) and a line charge 3 π mC/m along the y-axis?
(5 points) Q4 Given a certain charge distribution, what are the various approaches which can be used to
compute the electric field?
(4 points) www.Husni.net ...
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- Spring '12