AP Physics 2: Algebra-Based Flashcards: Electric Fields
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
A test charge of +2 nC is placed at a point where it experiences an electric force of 4 μN to the east. What is the electric field at that point?
The electric field is 2,000 N/C to the east, calculated using the equation E = F/q.
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A test charge of +2 nC is placed at a point where it experiences an electric force of 4 μN to the east. What is the electric field at that point?
The electric field is 2,000 N/C to the east, calculated using the equation E = F/q.
Define electrostatic equilibrium.
Electrostatic equilibrium is a state in which the excess charge on a solid conductor is distributed on its surface and the electric field within the conductor is zero.
What principle governs the calculation of the total electric field from multiple sources?
The principle of superposition governs this calculation, stating that the net electric field is the vector sum of individual fields.
Where does the excess charge reside on a solid conductor in electrostatic equilibrium?
The excess charge of a solid conductor in electrostatic equilibrium is distributed on the surface of the conductor.
What is the definition of the electric field at a given point?
The electric field at a given point is the ratio of the electric force exerted on a test charge at that point to the charge of the test charge.
What types of objects can produce an electric field?
An electric field can be produced by a single charged object, a configuration of point charges, or charged conductors and insulators.
A person is inside a hollow conducting sphere that is struck by lightning. Why are they safe from the electric field?
They are safe because the sphere is a conductor in electrostatic equilibrium, meaning the electric field within the conductor (and the hollow space inside) is zero.
How is the net electric field determined at a location with multiple nearby charged objects?
The net electric field at a given location is the vector sum of the individual electric fields created by each of the nearby charged objects.
What is the equation that relates the electric field (E), the electric force (FE), and the test charge (q)?
The relevant equation is E = FE / q, where all quantities can be treated as vectors.
What is the state of the electric field within a solid conductor in electrostatic equilibrium?
While in electrostatic equilibrium, the electric field within the solid conductor is zero.