As shown in the figure, an insulating rod is set into the shape of a semicircle. The left half of the rod has a charge of + Q uniformly distributed along its length, and the right half of the rod has a charge of -Q uniformly distributed along its length. Which vector shows the correct direction of the electric field at point P, the centre of the semicircle ?

Question

G1 Physics · Accepted Answer

Step 1: Use superposition, 𝐄 = Σ[1/(4πε₀)] qᵢ 𝐫ᵢ/rᵢ³, or the appropriate continuous-distribution integral. Step 2: Resolve components and exploit symmetry to cancel components. Step 3: Add the surviving components and compare with the choices. Final: Option C. In this specific setup, apply the calculation to: As shown in the figure, an insulating rod is set into the shape of a semicircle. The left half of the rod.