Stopping potential: Define stopping potential

Define stopping potential.The minimum negative potential given to the anode of a photo-cell for which the photoelectric current becomes zero is called stopping potential. The photocurrent gradually dies out and eventually stops flowing completely at some value of this reversed voltage. The potential difference at which the photocurrent stops flowing is called the stopping potential. Stopping potential is defined as the potential required to stop ejection of electron from a metal surface when incident beam of energy greater than the work potential of metal is directed on it. The term “stopping potential” refers to the minimum electric potential that needs to be applied to a charged particle to completely halt its motion. In other words, it is the electric potential that can counteract the kinetic energy of the particle, bringing it to a complete stop.