Two parallel infinite line charges with linear charge densities +$\lambda $ C/m and -$\lambda $ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?
${{2\lambda } \over {\pi {\varepsilon _0}R}}$ N/C
zero
${\lambda \over {\pi {\varepsilon _0}R}}$ N/C
${\lambda \over {2\pi {\varepsilon _0}R}}$ N/C
Solution
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