JEE Main 2026 Physics question
Two charged conducting spheres S₁ and S₂ of radii 8 cm and 18 cm are connected to each other by a wire. After equilibrium is established, the ratio of electric fields on S₁ and S₂ spheres are and respectively. The value of is .
Answer: (D)
Solution
Both spheres are at the same potential, so Q ∝ r, and the surface field E = kQ/r² ∝ 1/r. Hence E₁/E₂ = r₂/r₁ = 18/8 = 9/4.