Answer: Plum pudding model.
- A Nuclear model
- B Planetary model
- C Plum pudding model
- D Cubical model
Correct answer: C. Plum pudding model
Explanation: Thomson proposed a plum pudding model: electrons (plums) embedded in a spread-out positive charge (pudding).
In the photoelectric setup, light striking the metal plate ejects electrons that cross the evacuated tube to the collector, producing a measurable current on the ammeter.
Concept context
Photoelectric effect, de Broglie waves, Bohr's model, atomic spectra.