JEE Exam > JEE Questions > In photoelectric effect, the photoelectric cu...
Start Learning for Free
In photoelectric effect, the photoelectric current
- a)Increases when the frequency of incident photon increases
- b)Decreases when the frequency of incident photon decreases
- c)Does not depend on the photon frequency but depends only on the intensity of incident beam
- d)Depends both on the intensity and frequency of the incident beam of light
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In photoelectric effect, the photoelectric currenta) ...
Higher photocurrent implies, higher no. of electrons emitted/sec which in turn implies higher no. of photons incident per sec per unit area of higher intensity.
Moreover by increasing frequency, energy of incident photon gets changed but not their number
View all questions of this test
Moreover by increasing frequency, energy of incident photon gets changed but not their number
Most Upvoted Answer
In photoelectric effect, the photoelectric currenta) ...
The photoelectric effect refers to the emission of electrons from a material when it is exposed to electromagnetic radiation, typically in the form of light. The photoelectric current is the flow of these emitted electrons, and it is influenced by various factors such as the frequency and intensity of the incident light.
Frequency of Incident Photon:
- When light interacts with a material, it does so in discrete packets of energy known as photons. The energy of a photon is directly proportional to its frequency, meaning that higher frequency photons have greater energy.
- In the photoelectric effect, for an electron to be emitted from the material, it must absorb a photon with sufficient energy to overcome the binding energy of the electron.
- If the frequency of the incident photons is below a certain threshold value, regardless of the intensity, the electrons will not have enough energy to be emitted, and therefore no photoelectric current will flow.
- However, if the frequency of the incident photons is above the threshold, the electrons can absorb enough energy, and the photoelectric current will be observed.
- It is important to note that increasing the frequency of the incident photons does not directly increase the photoelectric current. Once the threshold is surpassed, further increases in frequency do not have a significant effect on the number of emitted electrons.
Intensity of Incident Beam:
- The intensity of the incident light refers to the number of photons per unit area per unit time. It represents the brightness or the total power of the light source.
- The intensity of the incident beam does not directly impact the photoelectric current. It only determines the number of photons incident on the material per unit time.
- Increasing the intensity will increase the number of incident photons, but each individual photon still needs to possess sufficient energy to overcome the binding energy of the electrons for emission to occur.
- Therefore, increasing the intensity will result in an increased number of emitted electrons per unit time, but it will not affect the maximum kinetic energy of the emitted electrons.
Conclusion:
Based on the above explanations, we can conclude that the photoelectric current does not depend on the frequency of the incident photon but rather on the intensity of the incident beam. The frequency only needs to be above a certain threshold for emission to occur, while the intensity determines the number of emitted electrons per unit time.
Frequency of Incident Photon:
- When light interacts with a material, it does so in discrete packets of energy known as photons. The energy of a photon is directly proportional to its frequency, meaning that higher frequency photons have greater energy.
- In the photoelectric effect, for an electron to be emitted from the material, it must absorb a photon with sufficient energy to overcome the binding energy of the electron.
- If the frequency of the incident photons is below a certain threshold value, regardless of the intensity, the electrons will not have enough energy to be emitted, and therefore no photoelectric current will flow.
- However, if the frequency of the incident photons is above the threshold, the electrons can absorb enough energy, and the photoelectric current will be observed.
- It is important to note that increasing the frequency of the incident photons does not directly increase the photoelectric current. Once the threshold is surpassed, further increases in frequency do not have a significant effect on the number of emitted electrons.
Intensity of Incident Beam:
- The intensity of the incident light refers to the number of photons per unit area per unit time. It represents the brightness or the total power of the light source.
- The intensity of the incident beam does not directly impact the photoelectric current. It only determines the number of photons incident on the material per unit time.
- Increasing the intensity will increase the number of incident photons, but each individual photon still needs to possess sufficient energy to overcome the binding energy of the electrons for emission to occur.
- Therefore, increasing the intensity will result in an increased number of emitted electrons per unit time, but it will not affect the maximum kinetic energy of the emitted electrons.
Conclusion:
Based on the above explanations, we can conclude that the photoelectric current does not depend on the frequency of the incident photon but rather on the intensity of the incident beam. The frequency only needs to be above a certain threshold for emission to occur, while the intensity determines the number of emitted electrons per unit time.
Attention JEE Students!
To make sure you are not studying endlessly, EduRev has designed JEE study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in JEE.
|
Explore Courses for JEE exam
|
|
Similar JEE Doubts
Top Courses for JEEView all
In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer?
Question Description
In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer?.
In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer?.
Solutions for In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer?, a detailed solution for In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In photoelectric effect, the photoelectric currenta) Increases when the frequency of incident photon increases b) Decreases when the frequency of incident photon decreases c) Does not depend on the photon frequency but depends only on the intensity of incident beam d) Depends both on the intensity and frequency of the incident beam of light Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice JEE tests.
|
|
Explore Courses for JEE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup