The electric field at a distance r from an infinite line charge of linear charge density λ is:

A parallel plate capacitor with air has capacitance C. With dielectric K, the capacitance becomes:

The energy stored in a capacitor of 10 μF charged to 100 V is:

Electric flux through a closed surface enclosing charge q is:

Two capacitors 3 μF and 6 μF in series. Equivalent capacitance:

Coulomb's law in SI units: F =

The electric potential at a point due to a point charge q at distance r is:

Electric field inside a conductor in electrostatic equilibrium is:

An electric dipole in a uniform field experiences:

Equipotential surfaces are always:

A charge Q is placed at the centre of a cube. Flux through one face:

The dielectric constant of a metal is:

Work done in moving a charge around a closed path in an electric field is:

Two point charges +q and −q are separated by distance d. Electric field at midpoint:

The capacitance of an isolated spherical conductor of radius R is:

Sharing of charges between two conductors occurs until:

The electric field due to a uniformly charged sphere at a point outside (distance r from centre) is equivalent to:

If the distance between two charges is halved, the electrostatic force becomes:

The potential energy of an electric dipole in a uniform field is:

In a Van de Graaff generator, charge is transferred to: