In photo electric 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:
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:
- (A)A and C only✓ Correct
- (B)A and E only
- (C)B and C only
- (D)A and B only
Answer: (A)
Solution
The photocurrent is set by how many photoelectrons are released each second, and this grows with the number of incident photons, so statement A is correct in making the photocurrent proportional to the intensity. From Einstein's photoelectric relation , the maximum kinetic energy of the emitted electrons is fixed by the frequency , so statement C is correct, while statement B (tying to intensity) and statement E (claiming independence from frequency) are both wrong. Emission depends on crossing a threshold frequency, not a threshold intensity, so statement D is wrong as well. Only statements A and C are correct.
JEE Main · 2023 · 08 Apr 2023 · Shift 2 · Single correct option