Create or find one qualitative question and one quantitative question relating to Electric Potential Energy & Electric Potential

here is an example:

Question: A negatively charged particle ( q = -2 c) moves through a 2000v loss of electric potential. Will there be a loss or a gain or electric potential energy? Will there be a loss or a gain of kinetic energy?

Answer: V = U/q

-2000 = U/-2

U = 4000J

There is an increase (gain) in electric potential energy.

K = -U = -4000J

There is a loss of kinetic energy.

Question: A negative charge moves through an electric field such that it slows down, losing 100 J of kinetic energy. The change in the electric potential experienced by the charge is -10 volts. What is the magnitude of the negative charge?

Answer: V = U/q

-10 = 100/q

q = -10 C (magnitude of 10 C)