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PhysicsNEET 2019Coulomb's law and superposition

Electric Charges and Fields

Two parallel infinite line charges with linear charge densities +λ C/m+\lambda\ \mathrm{C/m} and −λ C/m-\lambda\ \mathrm{C/m} are placed at a distance of 2R2R from each other in free space. What is the electric field midway between the two line charges?

  1. A.Zero
  2. B.2λπε0R\dfrac{2\lambda}{\pi\varepsilon_0 R} N/C
  3. C.λπε0R\dfrac{\lambda}{\pi\varepsilon_0 R} N/C✓
  4. D.λ2πε0R\dfrac{\lambda}{2\pi\varepsilon_0 R} N/C

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