WBCS.LIVE practice question

In the photoelectric effect, the stopping potential fundamentally depends on which characteristic of the incident light?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Intensity
  2. Speed
  3. Amplitude
  4. Frequency

Correct answer and explanation

Correct answer: Frequency

Explanation: āœ… Correct Answer: D) Frequency šŸ“š Explanation: In the photoelectric effect, the stopping potential is the minimum negative voltage required to completely stop the emission of photoelectrons. According to Einstein's photoelectric equation, this stopping potential depends directly on the frequency of the incident light and the nature of the material, but it is completely independent of the light's intensity.