Question

The photo-electric cell is connected to a source of variable potential difference, connected across it and the resulting photo-electric current $\left(\mu A\right)$ is plotted against the applied potential difference (V). The graph in the broken line represents a case for a given frequency and intensity of the incident radiation. If the frequency is increased and the intensity is reduced, which of the following graphs of unbroken line represent the new situation?

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is D

D

Intensity reduction implies that current is reduced. Frequency increase implies that stepping potential is increased.