radial electric feilds

What is a radial electric field?

Electric field lines directed radially inwards or outwards from a single point charge.

How does electric field strength vary in a radial field?

The electric field strength is the same at all points equidistant from the point charge. E = \frac{Q}{4\pi\epsilon0r^2}, where E is electric field strength, Q is the charge, \epsilon0 is the permittivity of free space, and r is the distance from the charge.

Direction of electric field lines

For a positive charge, the electric field lines point radially outwards. For a negative charge, the electric field lines point radially inwards.

Electric potential difference in radial field

The potential difference between two points in a radial field is given by: V = \frac{Q}{4\pi\epsilon0} (\frac{1}{r1} - \frac{1}{r2}), where V is potential difference, Q is the charge, \epsilon0 is the permittivity of free space, and r1 and r2 are the distances from the charge to the two points.