Question 222: Dual Nature of Matter and Radiation

Question

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 the photocell varies as follows :

Accepted Answer

As $$\lambda $$ is increased, there will be a value of $$\lambda $$ above which photo electrons will be cases to come out so photo current will become zero. Hence $$(d)$$ is correct answer.

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Dual Nature of Matter and Radiation

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 the photocell varies as follows :

Choose the correct answer: