- Exam
- JEE Main
- Year
- 2023
- Date
- 8 April
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Dual Nature of Matter
JEE Main 2023 · 8 April · Evening Shift · Physics · Dual Nature of Matter
In photoelectric effect A. The photocurrent is proportional to the...
In photoelectric effect
A. The photocurrent is proportional to the intensity of the incident radiation.
B. Maximum kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.
C. Max K.E. with which photoelectrons are emitted depends on the frequency of incident light.
D. The emission of photoelectrons require a minimum threshold intensity of incident radiation.
E. Max K.E. of the photoelectrons is independent of the frequency of the incident light.
Choose the correct answer from the options given below:
Options
- A and only
- B and only
- C and only
- D and only
Correct answer
C. and only
Step-by-step solution
With proper energetic radiation, the photoelectric current increases with an increase in accelerating potential until it reaches a point where it reaches its maximum and does not increase with an additional increase in accelerating potential.
For a given potential difference, the photocurrent is directly proportional to the intensity of the incident radiation.
The maximum kinetic energy of the emitted photoelectrons can be written as
{K}_\max = hν - \phi
From above equation, it can be seen that the maximum kinetic energy of the photoelectron depends on the frequency of the light used.
Hence, the statements A and C are correct.