What causes an electric charge?
The movement of electrons due to a difference in electric potential energy
The movement of protons due to a difference in electric potential energy
The movement of neutrons due to a waterfall
The movement of electrons due to kinetic energy
The movement of electrons due to a difference in electric potential energy
The movement of protons due to a difference in electric potential energy
The movement of neutrons due to a waterfall
The movement of electrons due to kinetic energy