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A cross section of long cylindrical structure with hollow core is shown in
Fig. Q3. A radial section of (b – a) mm thickness is filled with volume charge
density p, C/m³. Find the expression of the electric field intensity within
regions r < a and a < r < b. Then, determine the electric field intensity at
G,z). Note that z is an arbitrary point on the z-axis.
а
y
P, C/m?
a
Fig. Q3

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