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An infinitely long thin straight wire has uniform linear charge density of $ \large\frac{1}{3}\;$$ coul.m^{-1}. $ Then the magnitude of the electric intensity at a point 18 cm away is : (given $\in _{0}=8.8 \times 10^{-12} C^2 /N-m^2)$

\[\begin {array} {1 1} (1)\;0.33 \times 10^{11} NC^{-1} & \quad (2)\;3 \times 10^{11}NC^{-1} \\ (3)\;0.66 \times 10^{11}NC^{-1} & \quad (4)\;1.32 \times 10^{11}NC^{-1} \end {array}\]

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$(1)\;0.33 \times 10^{11} NC^{-1}$
answered Nov 7, 2013 by pady_1
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