NEET Physics Dual Nature of Matter and Radiation Einsteins Photo Electric Equation MCQs

A metal surface is illuminated by light of frequency $2

u_0$, where$

u_0$ is the threshold frequency. If the intensity of the light is doubled, the maximum kinetic energy of the emitted photoelectrons will:

Two different metals, M1 and M2, have work functions $\phi_1$ and $\phi_2$ respectively, where $\phi_1 > \phi_2$. If both metals are illuminated with light of the same frequency $

u$, such that$

u > \frac{\phi_1}{h}$, which metal will exhibit a larger stopping potential?

A photon of energy $3eV$ is incident on a metal surface having a work function of $2eV$. If the photon is absorbed, the maximum velocity of the emitted photoelectron is approximately (mass of electron $m_e = 9.1 imes 10^{-31} kg$):

The stopping potential for photoelectrons emitted from a metal surface illuminated by light of wavelength $\lambda$ is $V_0$. If the wavelength is reduced to $\lambda/2$, keeping the intensity constant, the new stopping potential will be:

If the kinetic energy of a photoelectron emitted from a metal surface is $K$ when the incident light has frequency $

u$, what will be the kinetic energy if the frequency is doubled, assuming the same metal is used?

A metal has a work function $\phi$. Light of frequency $

u_1$produces photoelectrons with maximum kinetic energy$K_1$. When the frequency is increased to$

u_2$, the maximum kinetic energy becomes$K_2$. Which of the following expressions correctly relates$\phi$,$

u_1$,$

u_2$,$K_1$, and$K_2$?

A metal surface is illuminated with light of frequency $2 imes 10^{15}$ Hz. The stopping potential for emitted photoelectrons is 6 V. What is the work function of the metal (in eV)? (Planck's constant $h = 6.63 imes 10^{-34}$ Js)

If the intensity of light incident on a metal surface is doubled, what will happen to the stopping potential?

The work function of a metal is 4.5 eV. What is the threshold frequency for photoelectric emission? ($h = 6.63 imes 10^{-34}$ Js)

Which of the following factors affects the maximum kinetic energy of photoelectrons emitted from a metal surface?