NEET Physics Dual Nature of Matter and Radiation MCQs

In Lenard's experiment, ultraviolet light of wavelength 200 nm is incident on a metal surface. The stopping potential is found to be 4V. If the wavelength is increased to 300 nm, what will be the new stopping potential? (Take $h = 6.63 imes 10^{-34}$ Js, $c = 3 imes 10^8$ m/s, $e = 1.6 imes 10^{-19}$ C)

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:

In Lenard's experiment, the stopping potential for photoelectrons emitted from a metal surface illuminated by light of wavelength $\lambda_1$ is $V_1$. If the wavelength is changed to $\lambda_2$ ($\lambda_2 > \lambda_1$), how does the stopping potential $V_2$ compare to $V_1$?

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 $\lambda/2$, the stopping potential becomes:

According to de Broglie, the wavelength of a particle is inversely proportional to its:

Which of the following particles will have the shortest de Broglie wavelength, given they all have the same velocity?

What is the de Broglie wavelength of an electron with momentum $10^{-24} kg \cdot m/s$? (Planck's constant $h = 6.626 imes 10^{-34} J \cdot s$)

The de Broglie wavelength of a particle is $10^{-12} m$. If its velocity is doubled, its new wavelength will be:

An electromagnetic wave of wavelength $\lambda$ is incident on a photosensitive surface with negligible work function. If the emitted photoelectron has mass $m$ and a de-Broglie wavelength $\lambda_d$, then what is the relationship between $\lambda$ and $\lambda_d$?

A photon of energy $E$ strikes a photosensitive material with negligible work function. An emitted photoelectron has a de Broglie wavelength $\lambda_d$. If the mass of the photoelectron is $m$, which of the following expresses the relationship between $E$ and $\lambda_d$?