Question

Which of the following statement is true?

• A. Saturation current depends on intensity
• B. Saturation current does not depend on intensity
• C. K.E depends on intensity
• D. Photocurrent depends on frequency

Hint:

Saturation current depends on the frequency of light and the material of the cathode, but not on the intensity of light. Intensity affects the number of emitted electrons, but not their maximum energy.

Answer 1

The Correct Option is B

- Saturation current: This is the current in a photocell when the potential difference between the anode and cathode is sufficiently high such that all the emitted photoelectrons are collected. Saturation current is independent of the intensity of light because it depends on the number of photoelectrons emitted, which is limited by the light frequency, not intensity. - Kinetic energy (K.E): The kinetic energy of the emitted photoelectrons depends on the frequency of the incident light, not on its intensity. The intensity only affects the number of emitted photoelectrons, not their energy. - Photocurrent: Photocurrent depends on both the intensity and frequency of the incident light. However, the saturation current is independent of intensity. Thus, option (B) is correct.