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30/12/2021 2:01 pm
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When the intensity of radiation incident on a photographic plate is increased keeping the frequency constant, then the number and K.E of photoelectrons emitted?
(a) Remains same and increases
(b) Increases and remains the same
(c) Decreases and remains the same
(d) Decreases and decreases
1 Answer
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30/12/2021 2:02 pm
Correct answer: (b) Increases and remains the same
Explanation:
As the intensity increases the number of photons striking on the surface increases hence the number of photoelectrons emitted increases whereas the energy of incident photons remains the same and hence the kinetic energy of emitted photoelectrons remains the same.