A plastic rod of length 1.0 m carries uniform charge +4.0 μC on one half and uniform charge -4.0 μC on the other half. Find the magnitude of its net electric dipole moment in μC·m.

Question

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: 2.