Answer: Remains unchanged.
- A Remains unchanged
- B Increases in direct proportion
- C Decreases to half
- D Becomes zero
Correct answer: A. Remains unchanged
Explanation: Maximum kinetic energy depends on the frequency of incident light and the work function, not on intensity. Increasing intensity increases the number of emitted electrons.
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.