1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
Ultraviolet light of wavelength 99 mm falls on a metal plate of work function 1.0 eV. If the mass of the electron is 9.1 $$\times$$ 10$$^{-31}$$ kg, the wavelength of the fastest photoelectron emitted is
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
If K$$_1$$ and K$$_2$$ are maximum kinetic energies of photoelectrons emitted when lights of wavelengths $$\lambda_1$$ and $$\lambda_2$$, respectively incident on a metallic surface and $$\lambda_1=3\lambda_2$$, then
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
The velocity of the proton is one-fourth the velocity of the electron. What is the ratio of the de-Broglie wavelength of an electron to that of a proton?
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
From the figure describing photoelectric effect, we may infer correctly that
Questions Asked from Dual Nature of Radiation (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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