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 ???? of the photocell varies as
follows

Answer 1

Answer:

The anode vollage of a photocell is kept fixed . The wavelength λof the light falling on the cathode varies as follows. Solution : As the wavelength λ of the incident light falling on cathode is gradually increased, there will be a value of λ above which the photoelectric emission will stop.

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. So, photocurrent will be zero.

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