A hollow sphere of copper is positively charged. Then the electric field inside the sphere is

Explanation

In a hollow conducting sphere, the electric field inside the sphere is zero. This is due to the principle of electrostatic equilibrium and Gauss's law, which states that there is no net electric field inside a conductor in electrostatic equilibrium.The formula for Gauss's Law in integral form is:∮ E ⋅ dA = Q / ε₀where:∮: Represents a closed surface integral, meaning the integration is carried out over a closed surface (often called a Gaussian surface).E: Electric field vector (N/C) at a point on the surface.dA: Infinitesimal area element of the surface. The dot product (⋅) indicates that the electric field vector is integrated over the component of the area element perpendicular to the field.