numerical problem on electric field

In the above problem, find the electric field and electric potential at the centre of the sphere due to induced charges on the sphere?

Statement-1 : A changing electric field produces a magnetic field Statement-2: A changing magnetic field produces an electric field.

Electric Dipole| Charge in an Electric field|Elctric Dipole Moment|Electric field intensity due to Electric pole

For an electric dipole potential & electric field

Problems based on magnetic field

Electric flux at a point in an electric field is

A point charge is brought in an electric field. The electric field at a near by point