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Two ideal electric dipoles A and B , having their dipole moment p 1 and p 2 respectively are placed on a plane with their centres at O as shown in the figure. At point C on the axis of dipole A , the resultant electric field is making an angle of 37 ° with the axis. The ratio of the dipole moment of A and B , p 1 p 2 is : ( take sin 37 ° = 3 5

Options

  1. A3 8
  2. B3 2
  3. C2 3
  4. D4 3

Correct answer

C. 2 3

Step-by-step solution

tan 37 ° = 3 4 = k P 2 r 3 2 k P 1 r 3 = P 2 2 P 1 = 3 4 P 2 P 1 = 3 2 P 1 P 2 = 2 3

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