The electric flux through a semisphere aligned with an electric field parallel to the X-axis can be calculated using the formula φ = ∫ E·dA. This flux is equivalent to the flux through the projection of the semisphere onto the YZ plane, which is perpendicular to the X-axis. When considering a sphere centered at the origin with no charge inside, the electric flux is zero, similar to the case with a cube. However, if there is a charge within the sphere, the flux would be determined by the equation φ = Q/ε₀. The discussion emphasizes the relationship between electric fields, flux, and charge presence.
