Q. In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is
A) 2.3 V
B) 1.8 V
C) 1.3 V
D) 0.5 V
Explanation
[Solution from source] The stopping potential satisfies eV₀ = K(max) = 0.5 eV, so V₀ = 0.5 V. The work function is irrelevant once K(max) is given; adding it (2.3 V) gives the photon energy, not the stopping potential. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.