MHT CET 2021 24th September Evening Shift | Dual Nature of Radiation Question 63 | Physics

A light of wavelength '$$\lambda$$' and intensity '$$\mathrm{I}$$' falls on photosensitive material. If '$$\mathrm{N}$$' photo electrons are emitted, each with kinetic energy 'E', then

$$\mathrm{E} \propto \mathrm{I}, \mathrm{N} \propto \lambda$$

$$\mathrm{E} \propto \mathrm{I}, \mathrm{N} \propto \mathrm{I}$$

$$\mathrm{E} \propto \mathrm{I}, \mathrm{N} \propto \frac{1}{\lambda}$$

$$\mathrm{E} \propto \frac{1}{\lambda}, \mathrm{N} \propto \mathrm{I}$$

MHT CET 2021 24th September Evening Shift

MCQ (Single Correct Answer)

-0

In a photoelectric experiment, a graph of maximum kinetic energy $$(\mathrm{KE}_{\text {max }})$$ against the frequency of incident radiation (v) is plotted. If $$\mathrm{A}$$ and $$\mathrm{B}$$ are the intercepts on the $$\mathrm{X}$$ and $$\mathrm{Y}$$ axis respectively then the Planck's constant is given by

$$\mathrm{A}+\mathrm{B}$$

$$\frac{B}{A^{\prime}}$$

$$\mathrm{A} \times \mathrm{B}$$

$$\frac{\mathrm{A}}{\mathrm{B}}$$

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

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A photon has wavelength $$3 \mathrm{~nm}$$, then its momentum and energy respectively will be $$[\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}, \mathrm{c}=$$ velocity of light $$=3 \times 10^8 \mathrm{~m} / \mathrm{s}]$$

$$2.21 \times 10^{-43} \mathrm{~kg} \mathrm{~ms}^{-1} ; 6.63 \times 10^{-34} \mathrm{~J}$$

$$2.21 \times 10^{-34} \mathrm{~kg} \mathrm{~ms}^{-1} ; 6.63 \times 10^{-25} \mathrm{~J}$$

$$2.21 \times 10^{-25} \mathrm{~kg} \mathrm{~ms}^{-1} ; 6.63 \times 10^{-17} \mathrm{~J}$$

$$2.21 \times 10^{-16} \mathrm{~kg} \mathrm{~ms}^{-1} ; 6.63 \times 10^{-19} \mathrm{~J}$$

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-0

In photoelectric experiment keeping the frequency of incident radiation and accelerating potential fixed, if the intensity of incident light is increased,

photoelectric current decreases

kinetic energy of emitted photoelectrons decreases

photoelectric current increases

kinetic energy of emitted photoelectrons increases

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