Electric Potential
Which of the following statements best describes electric potential energy?
The energy a charge possesses due to its motion in an electric field.
The energy stored in a system of charged particles due to their positions and interactions.
The force exerted on a charge by an electric field.
The rate at which charge flows through a conductor.
What happens to the electric potential energy as the distance between two like charges increases?
Increases
Decreases
Remains the same
Becomes zero
What amount of charge is needed to achieve a potential energy of -10 J at a distance of 1m with a +1C charge?
-1.11 \times 10^{-9} C
-2.11 \times 10^{-9} C
-3.11 \times 10^{-9} C
-4.11 \times 10^{-9} C
Three charges are arranged in an equilateral triangle with sides of length . All three charges have a magnitude of +q. What is the total electric potential energy of this system?
0
3k \frac{q^2}{a}
6k \frac{q^2}{a}
Three charges are located as follows: at (0,0), at (4m, 0), and at (0, 3m). How much work is required to bring a fourth charge, , from infinity to the point (4m, 3m)?
-0.0036 J
-0.0026 J
-0.0016 J
-0.0046 J
A charged particle with charge q moves between two points with a potential difference of . If the particle starts from rest, what is its final kinetic energy if only electric forces act on it?
q
-q
q^2
-
A charge of +2 C is moved from point A to point B in an electric field. The electric potential energy of the charge increases by 6 J. How much work was done by the external force?
-6 J
0 J
3 J
6 J

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Two charges, C and C, are separated by a distance of 2 meters. What is the electric potential energy of this two-charge system?
-0.054 J
-0.027 J
0.027 J
0.054 J
The work done by an external force to move charges into their current arrangement is equal to what?
The kinetic energy of the charges.
The electric potential energy stored in the system.
The heat dissipated by the charges.
Zero, if the process is done slowly.
What is the relationship between electric potential energy (U) and electric potential (V)?
V = Uq
V = U/q
U = V^2 q
U = V/q