What is electric potential and electric potential energy?

At 11:11 Sal said that if we let go of the particle all of 30J would be converted to kinetic energy. I get that if left, the particle would move away from the positively charged plate, but its still in the electric field so it should have some potential energy remaining, right? Incredible Question Great Question Good Question • 70 Votes. read more

Electric potential = Electric potential energy of an object / charge of the object = say, the amount of Joules required to hold per C of an object in an electric field Potential difference is the difference in potentials as calculated above between two points in the field. read more

If you have a vacuum tube, effectively giving you no resistance, an electron traveling across 1V gap would gain kinetic energy equal to potential energy drop, which is the charge of electron * 1V, or in units of electron charge, this is energy of 1 electron-volt (eV). In a circuit, however, all this energy is dissipated as heat. read more