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?

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?

A negative charge of 30 esu is at a distance of 30 cm from a positive charge of 20 esu. What is the potential at a point 10 cm from the first charge on the line joining the two charges? Where will the potential be zero?

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:

Determine the perpendicular distances of the points (-4,3,4) from the coordinates axes.

What will be the shape of the equipotential surface situated at infinity due to a point charge?

A point charge -q is carried from a point A to anther point B on the axis of a charged ring of radius r carrying a charge +q. If the point A is at a distance 4/3 r from the centre of the ring and the point B is 3/4 r from the centre but on the opposite side, what is the net work that need to be done for this

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?