A sphere of radius R has a charge density `sigma`. The electric intensity at a point at a distance r from its centre is

A charged disc of radius 3 m has charge density sigma . Electric field at a distance of 4 m from its centre on axis is _______

A charged disc of radius 3 m has charge density sigma . Electric field at a distance of 4 m from its centre on axis is _______

An insulated sphere of radius r haas a uniform volume charge density lambda . The electric field at a point A , which is at distance r from its centre is given by (R gt r)

A hallow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre:

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre

A hallow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre: