JEE Main Dual Nature of Radiation Practice Questions With Solutions

UV light of $4.13\mathrm{eV}$4.13 \textrm{ } eV is incident on a photosensitive metal surface having work function $3.13\mathrm{eV}$3.13 \textrm{ } eV. The maximum kinetic energy of ejected photoelectrons will be:

A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as :

A proton and an electron have the same de Broglie wavelength. If ${\mathrm{K}}_{\mathrm{p}}$K_{p} and ${\mathrm{K}}_{\mathrm{e}}$K_{e} be the kinetic energies of proton and electron respectively, then choose the correct relation :

A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is:

(Assume h = 6.63 $\times {10}^{-34}\mathrm{J}\mathrm{s},{\mathrm{m}}_{\mathrm{e}}=9.0\times {10}^{-31}\mathrm{kg}$\times 10^{- 34} \textrm{ } J \textrm{ } s , \left(\textrm{ } m\right)_{e} = 9.0 \times 10^{- 31} \textrm{ } kg and ${\mathrm{m}}_{\mathrm{p}}=1836$m_{p} = 1836 times ${\mathrm{m}}_{\mathrm{e}}$m_{e} )

When UV light of wavelength $300\mathrm{nm}$300 \textrm{ } nm is incident on the metal surface having work function $2.13\mathrm{eV}$2.13 \textrm{ } eV, electron emission takes place. The stopping potential is :

(Given hc $=1240\mathrm{eV}\mathrm{nm}$= 1240 \textrm{ } eV \textrm{ } nm )

Which of the following phenomena does not explain by wave nature of light.

A. reflection

B. diffraction

C. photoelectric effect

D. interference

E. polarization

Choose the most appropriate answer from the options given below:

In photoelectric experiment energy of $2.48\mathrm{eV}$2.48 \textrm{ } eV irradiates a photo sensitive material. The stopping potential was measured to be $0.5\mathrm{V}$0.5 \textrm{ } V. Work function of the photo sensitive material is :

Which of the following statement is not true about stopping potential $({\mathrm{V}}_0)$\left(\right. V_{0} \left.\right) ?

Given below are two statements :

Statement I : Figure shows the variation of stopping potential with frequency $(v)$\left(\right. v \left.\right) for the two photosensitive materials $M_1$M_{1} and $M_2$M_{2}. The slope gives value of $\frac{h}{e}$\frac{h}{e}, where $h$h is Planck's constant, e is the charge of electron.

Statement II : ${\mathrm{M}}_2$M_{2} will emit photoelectrons of greater kinetic energy for the incident radiation having same frequency.

In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements: one is labelled as Assertion $\mathbf{A}$\mathbf{A} and the other is labelled as Reason R.

Assertion A: Number of photons increases with increase in frequency of light.

Reason R: Maximum kinetic energy of emitted electrons increases with the frequency of incident radiation.

In the light of the above statements, choose the most appropriate answer from the options given below: