The work function φ₀ of a metal is best defined as

Question

Accepted Answer

C. {'text': 'The minimum energy needed to escape from the metal surface', 'label': 'C'}

1. Free electrons in a metal are held by attractive electrostatic forces near the surface.
2. To escape, they must gain a certain minimum energy.
3. That minimum energy is the work function, φ₀, measured typically in eV.
4. It depends on the metal and the state of its surface.
_Source: NCERT Class 12 Physics, Ch 11 "Dual Nature of Radiation and Matter", §11.2_

Answer

{'text': 'The kinetic energy of the fastest photoelectron', 'label': 'A'}

Answer

{'text': 'The frequency of incident light', 'label': 'B'}

Answer

{'text': 'The stopping potential at a specific frequency', 'label': 'D'}