Tuesday 26 April 2016

Electric Field Lines & Equipotential (Electric Potential) Surfaces.

● Electric field lines help us visualize the direction and
magnitude of electric fields. The electric field vector at any
point is tangent to the field line through that point. The density
of field lines in that region is proportional to the magnitude of
the electric field there. Thus, closer field lines represent a
stronger field.
● Electric field lines originate on positive charges and
terminate on negative charges. So, a field line extending from
a positive charge must end on a negative charge.

E=F/q


Equipotential Surfaces
Adjacent points that have the same electric potential form an equipotential 
surface, which can be either an imaginary surface or a real, physical surface. No net work W is done on a charged particle by an electric field when the particle moves between two points i and f on the same equipotential surface.



Electric Field Lines are perpendicular to Equipotential Surface.




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