Determine the electric field at a distance r from a point charge.

Define electric potential. Determine the electric potential at a distance r from a point charge q placed in vacuum. What would be the change in the potential if the charge is placed in a medium of dielectric constant k?

Determine the potential at a distance r from a point charge +q. How can the potential at a point be determined due to a number of point charges?

The electric field at a point is

What is the electric field intensity at a distance r from a charge q placed in vacuum ?

Determine the electric field at a point near a charged conductor. How does this value change at various points near the surface of an irregular shaped conductor?

The electric potential at a certain distance from a point charge is 600V and the electric field is 200 N//C . The distance of the point charge (in metres) is:

A thin spherical shel of radius R is charged with +q amount of charge. Use Gauss' law to find out the magnitude of the intensity of the electric field at a distance r from the centre of the shel, where (a) rlt R and(b) r gtR (ii) Show graphically how the magnitude of the intensity of the electric field changes with distance r from thke centre of the shell.

The classical concept of atomic structure is that negative charges are uniformly distributed inside a sphere of radius R keeping the nucleus of positive charge Ze at the centre of that sphere. An atom as a whole is electrically neutral. find out the electric field at a distance r from the nucleus, according do this atomic model.

Derive and expression for electric field at a distance r from the centre of a short dipole along its axis and hence prove that the ratio of electric fields in axial position to equatorial position of dipole is is 2:1 .