Two isolated metallic spheres of radii $R$ and $2R$ are charged such that both have the same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the larger sphere is $\sigma_1$. The ratio $\sigma_1$ to $\sigma$ is

Two identical conductors of copper and aluminium are placed in identical electric fields. The magnitude of induced charge in the aluminium will be

‘The interior of a conductor can have no excess charge in the static situation’. Explain.

Consider a finite insulated,uncharged conductor placed near a finite positively charged conductor. The uncharged body must have a potential

Explain the electrostatics of conductors. Explain the effects produced inside a metallic conductor placed in an external electric field.

$A$ point charge $Q$ is placed inside a cavity within a solid isolated conducting sphere. Consider points $A$, $B$ and $C$, where the magnitudes of the electric fields are $E_A$, $E_B$ and $E_C$, respectively. Point $A$ is inside the material of the conductor. Points $B$ and $C$ are at the same distance from the center of the solid sphere. The correct option is: