An isolated charge conductor is a charged particle or body that exists without influence from any other charges. It experiences no effects from other charges. An isolated conductor is a metal object not connected to or in contact with any other conductor. Electric field is always zero inside the conductor, and electric field from charges is always perpendicular to the surface at any point. When a positive charge +q is suspended at the center of a hollow spherical conductor, it induces a charge of -q on the interior surface and a charge of +q on the exterior surface of the conductor.

1. ISOLATED CHARGE CONDUCTOR
A charged particle or body is said to be an isolated charge if it exists
uninfluenced by any other charge, that is not experiencing the effect of any
other charge. This charged body could have a positive charge or a
negative charge.
An isolated conductor is any metal object not connected to or not in
contact with any other conductor . ... Electric field is always zero everywhere
inside the conductor. Electric field from charges is always perpendicular to
the surface at any point.

2. A Conductor in an Electric Field
A charge +q is suspended at the center of a hollow, electrically neutral, spherical
conductor in illustrates. Show that this charge induces (a) a charge of –q on the
interior surface and (b) a charge of +q on the exterior surface of the conductor.
Figure (A) A positive charge + q is suspended at the center of a hollow spherical conductor
that is electrically neutral. Induced charges appear on the inner and outer surfaces of the
conductor. The electric field within the conductor itself is zero.
Figure A

3. Gauss’s Law
 The total of the electric flux out of a closed surface is equal to the charge
enclosed divided by the permittivity. The electric flux through an area is defined
as the electric field multiplied by the area of the surface projected in a plane
perpendicular to the field.

4. Applications of Gauss’s Law
Gauss’s Law can be used to solve complex electrostatic problems involving unique
symmetries like cylindrical, spherical or planar symmetry.