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KCET 2025
MCQ (Single Correct Answer)
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The anode voltage of a photocell is kept fixed. The frequency of the light falling on the cathode is gradually increased. Then the correct graph which shows the variation of photo current I with the frequency $v$ of incident light is
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B
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D
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KCET 2024
MCQ (Single Correct Answer)
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-0
Light of energy $E$ falls normally on a metal of work function $\frac{E}{3}$. The kinetic energies $K$ of the photo electrons are
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KCET 2024
MCQ (Single Correct Answer)
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-0
The photoelectric work function for photo metal is 2.4 eV . Among the four wavelengths, the wavelength of light for which photoemission does not take place is
4
KCET 2023
MCQ (Single Correct Answer)
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A 60 W source emits monochromatic light of wavelength 662.5 nm. The number of photons emitted per second is
Questions Asked from Dual Nature of Radiation (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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