The electric potential at 0.9m from a point charge is `+50 V`. What is the magnitude and sign of the charge ?

The electric field due to a point charge at a distance 6 m from it is 630 N/C. The magnitude of the charge is

Potential at a point 0.1m from an isolated point charge is +100 volt. The nature of the point charge is

The electric potential at a point, due to a positive charge of 100uC at a distance of 9m is

A very small electric dipole with dipole moment p is placed in such in way that it is at a distance r from another point charge +q. The point charge lies on the axis of the dipole . Electric dipole moment is pointing towards the point charge. Determine electric dipole will attract the point charge or repel it ? What will be the magnitude of force between them ?

Electric field intensity at a point B due to a point charge Q kept at a point charge Q kept at point A is 24 NC^(-1) , and electric potential at B due to the same charge is 12 JC^(-1) . Calculate the distance AB and magnitude of charge.

The magnitude of electric field intensity and electric potential due to a point charge at a point is 72 N/C and 36V, respectively. Calculate magnitude of the charge and distance of the point from point charge.

The electric field at a point due to a point a charge is 30 N//C , and the electric potential at that point is 15 J//C . Calcualte the distance of the point from the charge and the magnitude of the charge.

The electrical potential at point in an electric field is 6 V. Find the work done in bringing 12 C of charge from infinity to that point.

Four equal point charges, each of magnitude +Q , are to be placed in equilibrium at the corners of a square. What should be the magnitude and sign of the point charge that should be placed at the center of the square to do this job?