Module 6.2 - Electric Fields

Question 1

Define electric field

Answer 1

Region around a body in which other charged bodies will feel a force due to the electric charge of the body

Question 2

Define electric field lines

Answer 2

Point in the direction a positive charge would move in if in that field

Question 3

Define electric field strength

Answer 3

Force per unit positive charge

Question 4

Define field

Answer 4

A region where a force is exerted on a force at a distance

Question 5

What does the force between two charges depend on?

Answer 5

Magnitude of charges

Distance between them

Question 6

Equation for work done

Answer 6

Electric field strength x charge x distance between plates

Question 7

Equation for acceleration between two parallel plates

Answer 7

(Electric field strength x charge) / mass

Question 8

Equation for vertical velocity between two plates

Answer 8

(Electric field strength x charge x distance) / (mass x horizontal velocity)

Question 9

Define electric potential

Answer 9

Work done in moving a unit of positive charge from infinity to a point in the field

Question 10

Define electric potential energy

Answer 10

Work done in moving a body of charge from infinity to a point in the field

Question 11

Assumptions of a positive isolated sphere

Answer 11

Charge is uniformly distributed on outer surface (outer surface is considered as a point charge at centre of sphere)
Electric field is radial (all points on the sphere have the same potential)