The K_max of the emitted photoelectron is related to the stopping pote…

Question

The K_max of the emitted photoelectron is related to the stopping potential V₀ by

Accepted Answer

D. {'text': 'K_max = eV₀', 'label': 'D'}

1. Photocurrent vanishes when the retarding potential exactly stops the fastest photoelectrons.
2. The energy needed to stop an electron of charge e across potential V₀ is eV₀.
3. Therefore K_max = eV₀ from energy conservation.
4. This is the standard formula relating stopping potential to maximum kinetic energy.
_Source: NCERT Class 12 Physics, Ch 11 "Dual Nature of Radiation and Matter", §11.4.2_

Answer

{'text': 'K_max = V₀/e', 'label': 'A'}

Answer

{'text': 'K_max = 2eV₀', 'label': 'B'}

Answer

{'text': 'K_max = e/V₀', 'label': 'C'}