1. Tardigrade
  2. Question
  3. Physics
  4. The anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of photocell varies as follows

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The anode voltage of a photocell is kept fixed. The wavelength $\lambda$ of the light falling on the cathode is gradually changed. The plate current $I$ of photocell varies as follows

JEE MainJEE Main 2013Dual Nature of Radiation and Matter

Solution:

As $\lambda$ is increased, there will be a value of $\lambda$ above which
photoelectron will cease to come out. So, photocurrent will be zero.