Answer: 1/√V.
- A 1/√V
- B √V
- C V itself
- D V squared
Correct answer: A. 1/√V
Explanation: λ = h/√(2meV), so λ ∝ 1/√V.
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.