Unit 3: Electric Force, Field, and Potential

AP Physics 2 — 25 practice questions with detailed explanations.

Unit summary

This unit covers core ideas tested on the AP exam. Each listed item links to a standalone page with the full stem, answer choices where applicable, a step-by-step explanation, and the correct answer.

All Questions in this Unit

Which of the following best describes the significance of electric potential in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of electric field in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of conductors in electrostatic equilibrium in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of Gauss law in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of field lines in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of electric potential difference in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of dielectrics in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of parallel plate capacitor in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of capacitance in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of electric potential energy in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of Coulombs law in electric force?easy · mcq · 1 pt
Which of the following best describes the significance of equipotential lines in electric force?easy · mcq · 1 pt
Two parallel plates have a potential difference of 100 V and are separated by 0.01 m. The electric field between them is:medium · mcq · 1 pt
The electric potential at the midpoint between two equal positive charges is:hard · mcq · 1 pt
Two point charges of +4μC and -4μC are separated by 0.1 m. The force between them is:medium · mcq · 1 pt
Two point charges +Q and -Q are placed at a distance r apart. The electric potential at the midpoint between them is:medium · mcq · 1 pt
A point charge q is placed at the center of a hollow conducting sphere with inner radius a and outer radius b. What is the electric field at a point between the inner and outer surfaces (a < r < b)?medium · mcq · 1 pt
Two identical capacitors are connected in series across a battery. How does the energy stored in this combination compare to the energy stored in a single capacitor connected across the same battery?medium · mcq · 1 pt
A capacitor is connected to a battery and charged to a certain voltage. The battery is then disconnected, and the distance between the plates of the capacitor is increased. What happens to the energy stored in the capacitor?hard · mcq · 1 pt
A charged particle is moving in a uniform magnetic field perpendicular to its velocity. If the particle's speed is doubled, how does this affect the radius of its circular path?hard · mcq · 1 pt
A parallel-plate capacitor has a capacitance of C when the plates are separated by a distance d. If the separation is doubled while the area of the plates remains constant, the new capacitance will be:easy · mcq · 1 pt
A proton is released from rest in a uniform electric field. As it moves, its:medium · mcq · 1 pt
Which of the following statements about electric field lines is correct?easy · mcq · 1 pt
What is the magnitude of the electric field at a distance of 2 cm from a point charge of 5 nC?easy · mcq · 1 pt
Two identical conducting spheres are charged with +4Q and -Q respectively. If they are brought into contact and then separated, what will be the charge on each sphere?medium · mcq · 1 pt