Find the magnitude of the electric field, in N C⁻¹, at point P due to the line charge shown. The linear charge density is λ = 2√2 nC m⁻¹.

Question

G1 Physics · Accepted Answer

Resolve the field contribution of the finite line charge at P using E = (λ/4πε₀r)(sinθ₁ + sinθ₂), with the angles obtained from the 9 m, 12 m and 16 m geometry. Substituting λ = 2√2 nC m⁻¹ gives E = 3 N C⁻¹. Therefore the integer answer is 3.