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Question 31415
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Electrostatics: Electric Field MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Electric FieldHardQuestion 31415

Question

Electric field at distance r from infinite line charge (linear charge density λ) is:
  1. A
    kλ/r²
  2. B
    2kλ/r
    Correct
  3. C
    kλ/r
  4. D
    λ/(2πε₀r²)

Correct answer

2kλ/r

Explanation

E = λ/(2πε₀r) = 2kλ/r. Perpendicular to the line, decreasing as 1/r (not 1/r² like a point charge).

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