Chapter 22 - Electric Fields Flashcards
A repulsive electrostatic force is _______.
An attractive electrostatic force is _______.
A repulsive electrostatic force is positive.
An attractive electrostatic force is negative.
What is an electric field?
The force field a stationary object creates due to its charge.
What is the electrostatic force?
The force between two charges, exerted by each electric field. If two charges are brought within range of each other’s electric fields, they will both experience the same electrostatic force (equal magnitude).
Electric field strength (and electric field) points in the same direction as F on a _____ object.
Electric field strength (and electric field) points in the opposite direction to the F on a _____ object.
Electric field strength (and electric field) points in the same direction as F on a positive object.
Electric field strength (and electric field) points in the opposite direction to the F on a negative object.
(where F is the electrostatic force)
The electric field produced by two oppositely charged plates is ________ to the surfaces of both plates.
The electric field produced by two oppositely charged plates is perpendicular to the surfaces of both plates.
What is the direction of the electric field produced by two oppositely charged plates?
+ve → -ve
What is electric potential at a point in an electric field?
The work done per unit charge to bring a small positive charge from infinity to that point in the electric field.
What is the electric potential energy between two OPPOSITELY charges?
Negative as an external force is not needed to do work to bring them closer together - the electric field does the work using the electrostatic force.
What is the electric potential energy of an object at a point in an electric field.
The work done by an external force to bring that object from infinity to that point in the electric field.
