All Flashcards
What is the effect of increasing the electric field strength on electric flux?
The electric flux through the surface increases proportionally.
What happens if the angle between the electric field and the area vector is 90 degrees?
The electric flux through the surface is zero.
What is the effect of the electric field lines going out of the surface?
The flux is positive.
What is the effect of the electric field lines going in of the surface?
The flux is negative.
Differentiate between calculating electric flux with a constant field and a varying field.
Constant Field: Use . Varying Field: Use (integration required).
What is electric flux?
A measure of the electric field passing through a given area.
Define area vector for closed surfaces.
A vector perpendicular to the surface, pointing outward.
What is positive electric flux?
Electric flux where the electric field and area vector point in similar directions (acute angle).
What is negative electric flux?
Electric flux where the electric field and area vector point in opposite directions (obtuse angle).
What is zero electric flux?
Electric flux where the electric field and area vector are perpendicular (90° angle).
Define area vector for open surfaces.
The direction of the area vector is determined by the problem context.