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QJEEM19Phad4d: JEE Main 2019 Physics - Class 12 JEEM19Phad4d Solution: Determine the electric dipole moment of the system of the three …

Determine the electric dipole moment of the system of the three charges, placed on the vertices of an equilateral triangle, as shown in the figure :

JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 177 English

Multiple Choice Options

  • A 2qℓj^2q\ell \widehat j
  • B (qℓ)i^+j^2\left( {q\ell } \right){{\widehat i + \widehat j} \over {\sqrt 2 }}
  • C 3 qℓj^−i^2\sqrt 3 \,q\ell {{\widehat j - \widehat i} \over {\sqrt 2 }}
  • D −3 qℓj^- \sqrt 3 \,q\ell \widehat j

Step-by-Step Verified Solution

JEE Main 2019 (Online) 12th January Morning Slot Physics - Electrostatics Question 177 English Explanation
∣P1∣=\left| {{P_1}} \right| = q(d)

∣P2∣=\left| {{P_2}} \right| = qd

|Resultant| == 2 P cos30o

     2 qd (32)\left( {{{\sqrt 3 } \over 2}} \right) = 3\sqrt 3 qd

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