Electric fields (5)

Question 1

Electric field

Answer 1

a region in space where a charged object experiences a force.

Question 2

Electric field strength

Answer 2

is defined by E=F/Q
In a uniform field E=V/d
and generally, E=-∆V/∆r
Units of electric field strength are NC-1 or Vm-1. The area under an E against r graph is ∆V, the change in potential.

Question 3

Absolute electric potential

Answer 3

the potential difference between a point and a point at zero potential, which is infinitely far away.

Question 4

Potential difference

Answer 4

the work done, against an electric field, in moving a unit charge from one point to a second point at a higher potential. If a charge moves from a point of higher potential to a lower potential, work is done by the electric field.
The amount of electrical work done per unit charge flowing through a component.