electric fields

Question 1

What are electric fields created by

Answer 1

charged particles

Question 2

Electric field strength definition

Answer 2

Force experienced per unit positive charge
Vector quantity

Question 3

Coulombs law applies to

Answer 3

Any two forces that exert an electrostatic force on each other
F ~ Qq F ~ 1/r^2

Question 4

comparing electric fields and gravitational fields

Answer 4

• electric fields can be attractive OR repulsive whereas gravitational fields are always attractive
• different equations , force per unit charge compared to force per unit mass

Question 5

electric potential definition
(scalar)

Answer 5

the work done in bringing a unit positive charge from infinity to a point
the electric potential is 0 at infinity