Lightning over the Icelandic volcano 2010

NASA

G) Electric Field - region in space where electric forces act on charges

"Did you know that

sharks can 'see'

electric fields?"

School Blocks YouTube? Use file below.

Electroreception (right click, save as)

A bonnethead shark biting actively and vigorously at various electric dipoles while ignoring the live fish swimming around with it.

Dr. Stephen M. Kajiura, Elasmobranch Research Lab, Boca Raton, FL

1) vector quantity

2) E = F/q (on reference)

E = Electric Field Strength (N/C)
q = amount of charge
F = force on charge

3) The direction of an electric field is drawn to show how the field acts on positive charge (Decided by convention)

Positive Spherical Charges Repel Positives
Outward in all Directions

Negative Spherical Charges Drawn Positives
In Toward the Center of the Charge

Electric Field Patterns

Spherical Charges

Radial Fields

Field at the
center of a charge
= zero

What is the charge below - Negative, Positive or Neutral?

c) 2 opposite charges

3 Dimensional View

d) 2 like charges

e) Field between a positive and neutral charge

f) Field Lines between opposite charged parallel plates

** Field between plates is uniform

- (same strength all over)

Charges and Fields Part II
Physics 2000