Relation Between Maximum Kinetic Energy And Stopping Potential
Relation Between Maximum Kinetic Energy And Stopping Potential — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Relation between Maximum Kinetic Energy and Stopping Potential Crucial for Photoelectric Effect problems involving the energy of emitted electrons and the retarding potential required to stop current flow. Identify that the stopping potential V 0 creates an electric field that does negative work on the electrons. The work done by the retarding field on an electron is W = qV = e V 0. By the Work-Energy Theorem, to stop the fastest electron, this work must equal its initial maximum kinetic energy. Therefore, K max = e V 0. Valid only for the photoelectric effect. Assumes non-relativistic speeds for electrons (standard for photoelectric effect). Stopping potential corresponds to the maximum kinetic energy, not the average. Confusing Stopping Potential (V 0) with Threshold Potential. Thinking Stopping Potential depends on the intensity of light (it depends on frequency). Assuming all emitted electrons have energy equal to eV 0 (only the maximum energetic ones do).