Year 13 - Electric Fields

Question 1

Coulombs Law

Answer 1

The electrostatic force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 2

Electric Field

Answer 2

A Region in space where a charged particle will experience a force.

Question 3

Electric Field Line

Answer 3

Direction that a positive test charge would accelerate.

Question 4

Electric Field Strength

Answer 4

Force per unit positive charge.

Question 5

Electric Potential

Answer 5

Work done [or energy needed] per unit charge [or (change in) electric pe per unit charge] on a (small) positive (test) charge in moving the charge from infinity (to the point) [not from the point to infinity].

Question 6

Electric Potential Energy

Answer 6

The work done by an external force in bringing the charge from infinity to that point in the field.

Question 7

Line of Equipotential

Answer 7

Line joining points of equal potential, which are at right angles to field lines.

Question 8

Permittivity of Free Space

Answer 8

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