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Question

Explain how does (i) photoelectric current and (ii) kinetic energy of the photoelectrons emitted in a photocell vary if the frequency of incident radiation is doubled, but keeping the intensity same? Show the graphical variation in the above two cases.

Solution
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Similar Questions
Q1
Explain giving reasons for the following :
(a) Photoelectric current in a photocell increases with the increase in the intensity of the incident radiation.
(b) The stopping potential (V0) varies linearly with the frequency (ν) of the incident radiation for a given photosensitive surface with the slope remaining the same for different surfaces.
(c) Maximum kinetic energy of the photoelectrons is independent of the intensity of incident radiation.
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Q2
If intensity of radiation incident on a photocell be increased four times keeping frequency constant, then number of photoelectrons and energy of photoelectrons emitted become
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Q3
In a plot of photo electric current v/s anode potential how does
(a) the saturation current varies with anode potential for incident radiations of different frequencies but same intensity.
(b) the stopping potential varies for different intensities but same frequency of incident radiation
(c) photoelectric current varies for different intensities but same frequency of incident radiation?
justify your answer in each case.
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Q4
Explain giving reasons for the following.
(a) Photoelectric current in a photocell increases with the increase in the intensity of the incident radiation.
(b) The stopping potential (V0) varies linearly with the frequency (ν) of the incident radiation for a given photosensitive surface with the slope remaining the same for different surfaces.
(c) Maximum kinetic energy of the photo-electrons is independent of the intensity of incident radiation.
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Q5
How many of the following statements are correct?
(a) K.E. of photoelectron does not depend upon the wavelength of incident radiation
(b) Photoelectric current depends on intensity of incident radiation and not on frequency
(c) Stopping potential depends on frequency of the incident radiation and not on intensity
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