3.7.3 - DEFINITIONS

Question 1

Coulombs law?

Answer 1

the size of the force acting bewteen two point charges is proportional to the product of their charges and inversely proportional to the square of their separation

Question 2

conductor?

Answer 2

a material containing free electrons that are able to move through the material and carry charge

Question 3

electric field?

Answer 3

a region surrounding a charged object which causes a force to be exerted on any charged object placed within the field

Question 4

electric field strength, E?

Answer 4

the force per unit charge exerted on a positive charge object placed at that point in the field

Question 5

electric potential, V?

Answer 5

the work done per unit charge on a positive test charge in bringing it from infinity to that point in the field

Question 6

equipotential?

Answer 6

a surface of constant potential; no work is done by the field when an object moves along an equipotential

Question 7

field line/ line of force?

Answer 7

a line representing the path that a positive charge would take when placed within the field

Question 8

permittivity of free space, ε0?

Answer 8

a measure of the ability of a vacuum to allow an electric field to pass through it

Question 9

radial field?

Answer 9

a field in which the field lines are all directed towards a single point

Question 10

uniform field?

Answer 10

a field in which all of the field lines are parallel and equally spaced - field strength is equal in all areas of the field

Question 11

Electric potential difference?

Answer 11

The work done moving a positive charge from one point to another; moving it through a potential difference