1. ELECTRIC FIELDS

2. I. Electric Field Assume you have a point charge somewhere in space.
If you place a tiny point charge (q0), into that space, the electric field will apply a force to that test charge. q0 +

3. II. Electric Field Strength
FORMULA
F is the force on the test charge.
Unit of Electric Field is a N/C
E = F/q0 or E= kq/r2

4. III. Other Electric Field Formulas
E = V/d
As distance increases from the Charge, the potential, or work decreases.
V= kq/r
The closer you get to a charge, the greater the potential
The bigger the charge the greater the potential

5. III. Electric Field Lines
Always go from positive to negative.
OR,
Positive away
Negative toward
EXAMPLES
Hey, it is easier to draw them by hand

6. What is the Field strength .02 m from 2.0 x 1015 protons?
PROBLEMS
What is the Electric Field strength of a point charge if N push an electron?
What is the Field strength m from 2.0 x 1015 protons?