Verified Solution • 2025–26 Session moderate

QNEET-2019-Ph-807: NEET 2019 Physics - Class 12 NEET-2019-Ph-807 Solution: Two parallel infinite line charges with linear charge densities …

Two parallel infinite line charges with linear charge densities +λ+\lambda C/m and −λ-\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? λπϵ0R N/C\frac{\lambda}{\pi\epsilon_0 R}\ \text{N/C} zero 2λπϵ0R N/C\frac{2\lambda}{\pi\epsilon_0 R}\ \text{N/C} λ2πϵ0R N/C\frac{\lambda}{2\pi\epsilon_0 R}\ \text{N/C}

Multiple Choice Options

  • A 2λπε0R{{2\lambda } \over {\pi {\varepsilon _0}R}} � _ 0 _ R 2 _ _ N/C
  • B zero
  • C λπε0R{\lambda \over {\pi {\varepsilon _0}R}} � _ 0 _ R _ _ N/C
  • D λ2πε0R{\lambda \over {2\pi {\varepsilon _0}R}} 2 � _ 0 _ R _ _ N/C

Step-by-Step Verified Solution

E _ n e t = E _ 1 + E _ 2 = _ 2 � _ 0 R + _ 2 � _ 0 R = _ � _ 0 R N/C

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