1. [Electric Fields]

2. Electric Field
When an object is placed in a region near a charged body, the object experiences a force. We call this region an electric field.

3. We can show electric fields by lines with arrows.

4. We can show electric fields by lines with arrows.
Electric field lines

8. The direction of an electric field is given by the direction in which a positive charge would move when placed in the field.
positive charge

9. positive charge
positive charge

10. By definition,
positive charge -- point outward
negative charge -- point inward

12. Electric Field patterns

13. Electric Field patterns
(+ & - )

14. Electric Field patterns
(+ & - )

21. Electric field line rules
The field lines start at positive charges and end at negative charges
Field lines do not have branches and do not cross each other
When the field is uniform (its strength and direction are constant), the lines are parallel.
The density of field lines represent the strength of the electric field