Electric Potential Energy Quiz: Test Your Knowledge with AP Physics 1 Questions

📚 Quick Study Guide

⚡ Electric Potential Energy ($U$) is the energy a charge possesses due to its location in an electric field. 💡 The change in electric potential energy ($\Delta U$) is equal to the negative of the work done by the electric force: $\Delta U = -W$. ➗ Electric potential ($V$) is the electric potential energy per unit charge: $V = \frac{U}{q}$. 📏 The electric potential difference ($\Delta V$) between two points is the change in electric potential energy per unit charge: $\Delta V = \frac{\Delta U}{q}$. 💡 For a uniform electric field, the potential difference is given by: $\Delta V = -E \cdot d$, where $E$ is the electric field strength and $d$ is the displacement. ➕ The electric potential due to a point charge $q$ at a distance $r$ is: $V = \frac{kq}{r}$, where $k$ is Coulomb's constant. 📝 Remember that electric potential is a scalar quantity, while electric field is a vector quantity.

Practice Quiz

1. A positive charge is moved from point A to point B in a uniform electric field. The electric potential at point A is higher than at point B. What happens to the electric potential energy of the charge?
   1. Increases
   2. Decreases
   3. Remains the same
   4. Cannot be determined
2. Two point charges, +q and -q, are placed a certain distance apart. At which location is the electric potential zero?
   1. Midway between the charges
   2. Closer to the +q charge
   3. Closer to the -q charge
   4. Electric potential is never zero
3. What is the unit of electric potential?
   1. Coulomb (C)
   2. Volt (V)
   3. Ampere (A)
   4. Ohm (Ω)
4. If the electric potential at a point is 10 V, what is the electric potential energy of a -2 C charge placed at that point?
   1. 20 J
   2. -20 J
   3. 5 J
   4. -5 J
5. A proton (charge +e) is accelerated from rest through a potential difference of $\Delta V$. What is the kinetic energy gained by the proton?
   1. e / $\Delta V$
   2. $\Delta V$ / e
   3. e$\Delta V$
   4. e + $\Delta V$
6. Which of the following statements is true regarding electric potential?
   1. Electric potential is a vector quantity.
   2. Electric potential is constant in an electric field.
   3. Electric potential is a scalar quantity.
   4. Electric potential is always positive.
7. What happens to the electric potential energy of two positive charges as they are brought closer together?
   1. Increases
   2. Decreases
   3. Remains the same
   4. Becomes zero