Which of the following represents the equipotential lines of a dipole (two equal and opposite charges placed at small separation)?
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Question

Which of the following represents the equipotential lines of a dipole (two equal and opposite charges placed at small separation)?

G1 Physics · Accepted Answer

Step 1: Use 𝐩 = Σqᵢ𝐫ᵢ (for net zero charge), V = [1/(4πε₀)](𝐩·𝐞ᵣ/r²) and 𝛕 = 𝐩×𝐄 as needed. Step 2: Resolve 𝐩 into components and use the small-angle approximation τ ≈ -pEθ for oscillations. Step 3: Substitute the given geometry and simplify. Final: Option D.