Point P lies on the axis of an electric dipole. If the dipole is rotated by 90° anticlockwise, through what angle does the electric field $\vec{E}$ at P rotate?
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Question

Point P lies on the axis of an electric dipole. If the dipole is rotated by 90° anticlockwise, through what angle does the electric field E ⃗ \vec{E} E at P rotate?

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: A: 90° clock wise.