http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html [2]
http://en.wikipedia.org/wiki/Electric_field [3]
http://www.physicsclassroom.com/class/estatics/Lesson-4/Electric-Field-I... [4]
http://www.britannica.com/EBchecked/topic/182554/electric-field [5]
http://physics.bu.edu/~duffy/PY106/Electricfield.html [6]
http://phet.colorado.edu/en/simulation/charges-and-fields [7]
http://www.physics.usyd.edu.au/super/life_sciences/E/E-all.pdf [8]
Links
[1] https://www.hootsgo.org/?q=node/6393
[2] http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html
[3] http://en.wikipedia.org/wiki/Electric_field
[4] http://www.physicsclassroom.com/class/estatics/Lesson-4/Electric-Field-Intensity
[5] http://www.britannica.com/EBchecked/topic/182554/electric-field
[6] http://physics.bu.edu/~duffy/PY106/Electricfield.html
[7] http://phet.colorado.edu/en/simulation/charges-and-fields
[8] http://www.physics.usyd.edu.au/super/life_sciences/E/E-all.pdf