A uniform line charge of ρL = 3μc/m lies along z-axis and a concentric circular cylinder of radius 2 m has surface charge density \({{\rho }_{s}}=-\frac{1.5}{4\pi }\mu c/{{m}^{2}}\). Both line and cylinder are infinity long z-axes. Compute the electric flux density \(\vec{D}\) for a region r > 2.

\(-\frac{0.239}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{3}} \right)\)

\(\frac{0.477}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{2}} \right)\)

\(-\frac{0.477}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{3}} \right)\)

\(\frac{0.239}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{2}} \right)\)

A uniform line charge of ρL = 3μc/m lies along z-axis and a concentr

1.	A uniform line charge of ρL = 3μc/m lies along z-axis and a concentric circular cylinder of radius 2 m has surface charge density \({{\rho }_{s}}=-\frac{1.5}{4\pi }\mu c/{{m}^{2}}\). Both line and cylinder are infinity long z-axes. Compute the electric flux density \(\vec{D}\) for a region r > 2.
A.	\(\frac{0.477}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{2}} \right)\)
B.	\(-\frac{0.477}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{3}} \right)\)
C.	\(\frac{0.239}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{2}} \right)\)
D.	\(-\frac{0.239}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{3}} \right)\)
Answer» D. \(-\frac{0.239}{r}{{\hat{a}}_{r}}\left( \mu c/{{m}^{3}} \right)\)

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A uniform line charge of ρL = 3μc/m lies along z-axis and a concentric circular cylinder of radius 2 m has surface charge density \({{\rho }_{s}}=-\frac{1.5}{4\pi }\mu c/{{m}^{2}}\). Both line and cylinder are infinity long z-axes. Compute the electric flux density \(\vec{D}\) for a region r > 2.

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