problem 1: Illustrate the meaning of the word electric field strength at a point.

problem 2: Illustrate the relationship for the electric field strength, E:

a) At a distance r from a point charge Q.
b) Between two parallel plates, a distance d apart, when a potential difference (p.d.) V is applied across the plates.

problem 3: Compute the electric field strength at a distance of 1.0 × 10^-10 m from a helium nucleus.

problem 4: A small sphere has a charge of +2.0 ^oC. At what distance from sphere is the magnitude of the electric field strength 7.2 × 10⁴ N C^–1?

problem 5: A point charge of 4.0 ^oC experiences an electrostatic force of 0.02 N. Compute the electric field strength at the position of this charge.

problem 6:

a) A small charged sphere generates electric field strength of 1.0 N C^–1 at a distance of 1.0 m. Compute the charge on the sphere.

b) State the magnitude of the electric field strength at a distance of 2.0 m from the charged sphere.