To play around with....

Recall the definition of electric field (E-field):

- region surrounding a charged object (or chunk of charge)

- represented by arrows that indicate the direction a "tiny positive test charge" (like a proton) would take if placed in the field

Applets to play with:

https://phet.colorado.edu/en/simulation/charges-and-fields

Maybe these:

http://www.falstad.com/emstatic/

http://www.dgp.toronto.edu/~mjmcguff/research/electrostatic/applet1/main.html

http://surendranath.tripod.com/Applets/Electricity/FieldLines/EFL.html