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JEE Main202315 Apr 2023Morning ShiftPhysicsElectrostaticsActual

The electric field due to a short electric dipole at a large distance r from center of dipole on the equatorial plane varies with distance as :

Options

  1. Ar
  2. B1 r 2
  3. C1 r 3
  4. D1 r

Correct answer

C. 1 r 3

Step-by-step solution

An electric dipole is a system of two charges of equal and opposite magnitude placed at a short distance. The dipole moment is, p = 2 q l . The electric field due to the dipole is, E = 2 k p r 3 Clearly, the electric field varies as 1 r 3 .

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