1. Tardigrade
  2. Question
  3. Physics
  4. To observe the effect of intensity of light on photocurrent, I. collector is maintained at positive potential with respect to emitter. II. frequency of incident light is kept fixed. III. accelerating potential is fixed. IV distance of surface from emitter is kept constant. Which of the above statements are correct?

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Q. To observe the effect of intensity of light on photocurrent,
I. collector is maintained at positive potential with respect to emitter.
II. frequency of incident light is kept fixed.
III. accelerating potential is fixed.
IV distance of surface from emitter is kept constant.
Which of the above statements are correct?

Dual Nature of Radiation and Matter

Solution:

To study effect of intensity, the collector $A$ is maintained at a positive potential with respect to emitter $C$ so that electrons ejected from $C$ are attracted towards collector $A$. Keeping the frequency of the incident radiation and the accelerating potential fixed, the intensity of light is varied and the resulting photoelectric current is measured each time. It is found that the photocurrent increases linearly with intensity of incident light.