Embibe Experts Solutions for Chapter: Dual Nature of Matter and Radiation, Exercise 1: NEET - 17th July 2022

The graph which shows the variation of the de Broglie wavelength $\left(\lambda \right)$ of a particle and its associated momentum $\left(p\right)$ is :

When two monochromatic lights of frequency, $\nu$ and $\frac{\nu }{2}$ are incident on a photoelectric metal, their stopping potential becomes $\frac{V_S}{2}$ and $V_s$ respectively. The threshold frequency for this metal is:

An electromagnetic wave of wavelength  $\lambda$  is incident on a photosensitive surface of negligible work function. If  $m$  mass is of photoelectron emitted from the surface has de-Broglie wavelength ${\lambda }_{\mathrm{d}}$, then :

The number of photons per second on an average emitted by the source of monochromatic light of wavelength $600 \mathrm{nm}$, when it delivers the power of $3.3\times {10}^{-3} \mathrm{W}$ will be $:\left(h=6.6\times {10}^{-34} \mathrm{J} \mathrm{s}\right)$

The de-Broglie wavelength of an electron moving with kinetic energy of $144 \mathrm{eV}$ is nearly

An electron is accelerated from rest through a potential difference of $V$ volt. If the de Broglie wavelength of the electron is $1.227\times {10}^{–2}\mathrm{nm}$, the potential difference is:

Light of frequency $1.5$ times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is: