Physics - Modern Physics Question with Solution | TestHub
In photoelectric effect, keeping the frequency of incident radiation and accelerating potential fixed, if the intensity of incident light is increased,
Options:
Answer:
Solution:
In the photoelectric effect, the intensity of incident light is directly proportional to the number of photons incident per unit area per unit time.
Increasing the intensity of the incident light increases the number of photons striking the metal surface per second.
Since the frequency of the incident radiation is kept fixed, the energy of each individual photon () remains constant. Therefore, the maximum kinetic energy of the emitted photoelectrons () does not change.
However, a larger number of incident photons results in a larger number of photoelectrons being emitted per second.
This increase in the rate of emission of photoelectrons leads to an increase in the photoelectric current.
Answer: the photoelectric current increases.
