CUET · PHYSICS · PYQ PAPER 2023
Which of the following statements are correct?
A. Number of photoelectrons emitted per second is directly proportional to the intensity of incident radiation
B. Cut off potential is the minimum negative potential given to the plate for which photocurrent becomes maximum
C. For a given frequency of the incident radiation, the stopping potential is independent of its intensity
D. Even for the exceedingly dim incident radiation apparent time lag is \( \sim 10^{-9} \) s or less
E. Photons are electrically neutral and are not deflected by electric and magnetic fields
Choose the correct answer from the options given below:
- A B and D only
- B A, C, D and E only
- C A, B and E only
- D A, B, C, D and E
Answer & Solution
Correct Answer
(B) A, C, D and E only
Step-by-step Solution
Detailed explanation
A is Correct: The photoelectric current (number of photoelectrons) is directly proportional to the intensity of incident light. B is Incorrect: Cut-off (stopping) potential is the minimum negative potential at which the photocurrent becomes zero, not maximum. C is Correct:…
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