If intensity of incident light is increased in PEE then which of the following is truea)Maximum K.E. of ejected electron will increaseb)Work function will remain unchangedc)Stopping potential will decreased)Maximum K.E. of ejected electron will decreaseCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Work function is a the property of metal .it is that amount of energy which is needed to eject an election from this metal surface and it is fixed for every metal . can't be increase or decrease by changing the intensity of light (no of photon)

Answer

Simple theory that you know that intensity is directly proportional to no of electron ejected and kinetics energy/stopping potential depend upon the frequency of light incident now you do you got yours answer.

Answer

Solution:
To understand the effect of increasing the intensity of incident light in the photoelectric effect (PEE), let's consider the following points:
1. Photoelectric Effect:
The photoelectric effect is the phenomenon where electrons are ejected from a material when it is exposed to light of sufficient energy.
2. Work Function:
The work function (represented by the symbol Φ) is the minimum amount of energy required to remove an electron from the surface of a material. It is a characteristic property of the material.
3. Stopping Potential:
The stopping potential is the minimum potential difference required to stop the flow of photoelectrons from reaching the anode in a photoelectric setup.
Now, let's analyze the given options:
A: Maximum K.E. of ejected electron will increase:
Increasing the intensity of incident light does not change the energy of individual photons. Therefore, the maximum kinetic energy (K.E.) of the ejected electrons, which is determined by the energy of the incident photons and the work function of the material, will remain unchanged.
B: Work function will remain unchanged:
The work function of a material is a characteristic property and does not depend on the intensity of incident light. Therefore, increasing the intensity of incident light does not change the work function.
C: Stopping potential will decrease:
Increasing the intensity of incident light increases the number of photons incident on the material, resulting in more photoelectrons being emitted. As a result, the current in the photoelectric setup increases. To stop this increased current, a higher stopping potential is required. Therefore, increasing the intensity of incident light will increase the stopping potential.
D: Maximum K.E. of ejected electron will decrease:
As mentioned earlier, increasing the intensity of incident light does not change the energy of individual photons or the work function of the material. Therefore, the maximum kinetic energy (K.E.) of the ejected electrons will not decrease.
Hence, the correct answer is B: Work function will remain unchanged.

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