The maximum electric field at a point on the axis a uniformly charged ring is E₀. At how many points on the axis will the magnitude of electric field be E₀/2 :-
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Question

The maximum electric field at a point on the axis a uniformly charged ring is E₀. At how many points on the axis will the magnitude of electric field be E₀/2 :-

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: D: 4.