JEE Main 2019PhysicsElectrostaticsMediumMCQ

JEE Main 2019 — Electrostatics Question with Solution

JEE Main 2019 (12 Jan Shift 1)

Question

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

Choose an option

Show full solutionCorrect option: B
Correct answer
B-3 ql j^

Step-by-step explanation

P→1=ql

P→2=ql



Angle between them 60o

∴ Resultant dipole moment P=ql2+ql2+2ql2cos⁡60o

=3 ql

As P→1=P→2 direction of resultant is along negative y axis thus option is -3 ql j^

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About this question

This is a previous-year question from JEE Main 2019, covering the Electrostatics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.