Photoelectric Effect

What do you mean by the term photoelectrons?

The photoelectric effect is the emission of _____ or other free carriers when light shines on a material.

The kinetic energy of the photoelectrons ejected from a metal on irradiation with light of frequency $3.8\times {10}^{16} \mathrm{Hz}$ is K. When irradiated with light of frequency $2.4\times {10}^{16} \mathrm{Hz}$, the kinetic energy of the photoelectrons becomes $\frac{\mathrm{K}}{2}$. What is the threshold frequency $\left({\mathrm{\nu }}_0\right)$ of the metal?

In case of photoelectric effect, slope of ${\mathrm{V}}_{\mathrm{0}}$ vs $\mathrm{\nu }$ curve is (where ${\mathrm{V}}_{\mathrm{0}}$ - stopping potential,$\mathrm{\nu }=$ subjected frequency)

Photoelectric effect shows:

Select the correct statement about the photoelectric experiment from the following.

Light of wavelength $\mathrm{\lambda }$, shines on a metal surface with intensity $\mathrm{X}$, and the metal emits $\mathrm{Y}$ electrons per second of average energy $\mathrm{Z}$. What will happen to $\mathrm{Y}$ and $\mathrm{Z}$ if $\mathrm{X}$ is doubled?

In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the frequency of incident light.

The work function of sodium metal is $4.41\times {10}^{-19} \mathrm{J}$. If photons of wavelength $300 \mathrm{nm}$ are incident on the metal, the kinetic energy of the ejected electrons will be $\left(\mathrm{h}=6.63\times {10}^{-34} \mathrm{J} \mathrm{s}; \mathrm{c}=3\times {10}^8 \mathrm{m}/\mathrm{s}\right)$ _______$\times {10}^{-21} \mathrm{J}$.

A zinc ball of radius, $R=1 \mathrm{cm}$ charged to a potential $-0.5 \mathrm{V}.$ The ball is illuminated by a monochromatic ultraviolet $\left(UV\right)$ light with a wavelength $290\mathrm{nm}.$ The photoelectric threshold for zinc is $332\mathrm{nm}.$ The potential of ball after a prolonged exposure to the $UV$ is

A certain metal has a work function of $\Phi =2\mathrm{eV}$. It is irradiated first with $1 \mathrm{W}$ of $400\mathrm{nm}$ light and later with $1 \mathrm{W}$ of $800\mathrm{nm}$ light. Among the following, the correct statement is: [Given:Planck constant $\left(\mathrm{h}\right)$$=6.626\times {10}^{-34} {\mathrm{m}}^2{\mathrm{kgs}}^{-1}$ Speed of light $\left(\mathrm{c}\right)=3\times {10}^8 {\mathrm{ms}}^{-1}$]

Ultra-violet light is shone on a zinc surface and photoelectrons are emitted. The graph shows how the stopping potential $V_{\mathrm{s}}$ varies with frequency $f.$

Planck's constant may be determined from the charge of an electron $e$ multiplied by

A light of frequency $1.6\times {10}^{16} \mathrm{Hz}$ when falls on a metal plate emits electrons that have double the kinetic energy compared to the kinetic energy of emitted electrons when frequency of $1.0\times {10}^{16} \mathrm{Hz}$ falls on the same plate. The threshold frequency $\left({\mathrm{v}}_0\right)$of the metal in $\mathrm{Hz}$ is

If the work function for Caesium $\left(\mathrm{Cs}\right)$ atom is $1.9 \mathrm{eV}$, find the approximate value of its threshold wavelength.

A $\mathrm{H}$-like species emitted a photon corresponding to the first line of Lyman series. The photon liberated a photoelectron from ${\mathrm{He}}^{+}$ in ground state. The de-Broglie wavelength of the photoelectron is $2 \stackrel{\mathrm{o}}{\mathrm{A}}$. Calculate the atomic number of $\mathrm{H}$-like species.

A $64 \text{watt}$ bulb emit monochromatic radiations of $310 \mathrm{nm}$, emitted radiation strike on a metal surface of work function $4.7 \mathrm{eV}$. Then the number of photoelectrons emitted per second will be -

The value of stopping potential in the following diagram

In an experiment of Photoelectric effect graph for ${\mathrm{KE}}_{\max }$ of ejected photo electron v/s frequency of incident light is plotted.

Then threshold wavelength $\left({\lambda }_0\right)$ of metal is -

When a photon of light collides with metal surface, possible number of electrons coming out is