Q.17) Which of the following options represent the variation of photoelectric current with property of light shownon the $x$-axis?
A) B and D
B) A only
C) A and C
D) A and D
Correct Option: (4) A and D
Solution:
Photoelectric current increases linearly with the intensity of light when the frequency is above the threshold, as shown in graph A. Graph D correctly shows that below the threshold frequency, no current is emitted, and above it, the current becomes constant (assuming constant intensity).
Hence, the answer is option (4) A and D.