Module 6 - 6.2.2 Coulomb's Law

Question 1

To find the resultant electric field or two or more charges

Answer 1

find the vector sum of the electric fields of the individual charges

Question 2

Electric fields are one of

Answer 2

a number of forms of field giving rise to a force

Question 3

Gravitational vs Electric (4)

Answer 3

• Electric field strength is defined as force per unit positive charge, whereas gravitational field strength is defined as force per unit mass
• Electrostatic force can either be attractive and repulsive whereas gravitational force is only attractive
• Electric field lines radial and can act either inwards or outwards whereas gravitational field lines are radial and only act inwards
• Both electric and gravitational force and field strength follow an inverse square law

Question 4

Coloumb’s Law

Answer 4

The force between two point charges is:
- directly proportional to the product of the two charges
- inversely proportional to the distance between the charges squared