How does the intensity affect the photoelectric current?
Correct answer: A. As intensity increases, the photoelectric current increases
- A. As intensity increases, the photoelectric current increases
- B. As the intensity increases, the photoelectric current decreases
- C. As the intensity decreases, the photoelectric current becomes twice
- D. No effect
Explanation
Since each incident photon ejects one photoelectron from a metal surface, therefore, the number of photoelectrons emitted depends on the number of photons falling on the metal surface, which in turn depends on the intensity on the incident light.Hence, as the intensity increases, the number of photoelectrons ejected increases and hence photoelectric current increases.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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