Question

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

Answer 1

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 the photocell varies as follows: ... As λ is increased, there will be a value of λ above which photoelectrons will cease to come out.

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