Electric Field
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Phys 4, Section 2                                                                          Jan 18, 2002

                                Electric Field

, where qo is a small test charge moved around in space.

For the electric field E around a point charge q, get

Another form of this equation uses a different constant defined as


Field Lines

 Field lines originate on positive charges and terminate on negative charges.  A field line represents the path through space that a small positive test charge would follow if placed in that space.  The electric field E at a point is tangent to the field line at that point.




Last modified on January 23, 2002