Electrostatics 2

Electric Field, Electrostatic Potential, Electrostatic Potential Energy

Definition of Electric Field?

Electric field is sthe region in which a test charge can experience an electric force due to the presence of a source charge.

What is Electric Field Strength?

Electric field strength at a point is equal to the force experienced by unity positive test charge.

The two formulae for Electric Field are? (vector forms please)

Formula for electric field due to a charged circular arc at its centre?

Formula for electric field due to a charged ring at a point on its axis?

If there is a charged ring, how far along its axis from the centre will give maximum electric field? What will the magnitude of the electric field be at that point