Consider a Gaussian surface as shown. A and C are the circular faces while B is the curved surface. A charge q is moved along the axis of cylinder with constant velocity v. Choose the correct variation of flux through the surface / cylinder.

Question

G1 Physics · Accepted Answer

Step 1: Use Gauss's law Φ = Q/ε₀ for a closed surface. Step 2: Use symmetry/solid-angle sharing to determine how much of the total flux crosses the requested part of the surface. Step 3: Substitute the enclosed charge and geometry. Final: Option A; Option B; Option C.