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Question 31409
JEE Physics · Medium

Electrostatics: Electric Field MCQ

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Electric FieldMediumQuestion 31409

Question

Field on axial line of electric dipole at distance r (r >> a) is:
  1. A
    kp/r³
  2. B
    2kp/r³
    Correct
  3. C
    kp/r²
  4. D
    kp/(2r³)

Correct answer

2kp/r³

Explanation

E_axial = 2kp/r³ (directed along p). E_equatorial = kp/r³ (anti-parallel to p). Axial field is twice equatorial.

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