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If the intensity of incident radiation in a photo-cell is increased, how does the stopping potential vary?
  • a)
    Increases
  • b)
    Remains the same
  • c)
    Decreases
  • d)
    Infinite
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
If the intensity of incident radiation in a photo-cell is increased, h...
Explanation:

When incident radiation falls on a photo-cell, it causes the emission of photoelectrons. The intensity of incident radiation is directly proportional to the number of photons hitting the photo-cell per unit area and per unit time.

Stopping Potential:

The stopping potential is the minimum potential difference required to stop the emission of photoelectrons from a photo-cell. It is the potential difference necessary to counteract the kinetic energy of the fastest-moving photoelectron.

Effect of Increasing Intensity:

When the intensity of the incident radiation is increased, the number of photons hitting the photo-cell per unit area and per unit time also increases. This leads to an increase in the number of photoelectrons emitted from the photo-cell.

However, the stopping potential does not depend on the intensity of the incident radiation. It only depends on the energy of the incident photons. The energy of a photon is given by the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the incident radiation.

Key Points:
- The stopping potential depends on the energy of the incident photons, not the intensity.
- Increasing the intensity of the incident radiation will increase the number of photoelectrons emitted, but it will not change the energy of the incident photons.
- Therefore, the stopping potential remains the same even if the intensity of incident radiation is increased.

Conclusion:

In conclusion, the stopping potential in a photo-cell remains the same when the intensity of the incident radiation is increased. This is because the stopping potential depends only on the energy of the incident photons, which is not affected by the intensity.
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Community Answer
If the intensity of incident radiation in a photo-cell is increased, h...
There is no effect on stopping potential. The intensity of incident radiation is independent of stopping potential. Therefore, even if the incident radiation in a photo-cell is increased, the stopping potential remains unchanged.
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