2 • Electric Fields

Label This Diagram

Electric Field Strength

a - high voltage source

b - metal plates

c - semolina

d - oil

Demonstrate Electric Fields • 1

• Metal plates in oil

• Connect high voltage source to metal plates

Demonstrate Electric Fields • 2

• Semolina line up in the

direction of the field

• Shows electric field pattern

Define Coulomb's Law

The force of attraction or repulsion between two charges is

• proportional to their charges

• inversely proportional to the square of the distance between them

Label This Formula

Coulomb's Law

F - force

E - Permittivity

d - distance

q1 - charge of object 1

q2 - charge of object 2

What page of the log tables can you find the value of Permittivity?

47

What page of the log tables can you find the value of electronic charge (Q1)?

46

What page of the log tables can you find the Coulumbs Law Formula?

61

Define Electric Field Strength (E)

Electric Field Strength at a point is the force per unit charge at that point

State the SI Unit for Electric Field Strength

NC-1

Label This Formula

Electric Field Strength

E - Electric field strength

F - force

q - charge

What page of the log tables can you find the Electric Field Strength Formula?

61