Answer
Verified
394.2k+ views
Hint: first of all check the graph thoroughly in which the x intercept is the point up to which photoelectric effect will take place. Below this point there will be no photo electric effect taking place. The equation for the work function is also helpful in solving this question.
Complete step by step answer:
Firstly, let us take a look at what actually the photoelectric effect means. Photoelectric effect is defined as a phenomenon in which electrically charged particles are ejected from or within a substance when it is absorbing electromagnetic radiation. The effect is sometimes explained as the ejection of electrons from a metal plate when light shines on it.
The x-intercept in the graph given is being the last point up to which only the photoelectric effect is non zero. Below this point there is no photo electric effect.
Therefore the work function of the material is given by the equation,
$W=h{{\nu }_{0}}$
Where $h$ is the Planck’s constant, ${{\nu }_{0}}$ is the threshold frequency.
From the graph we got an information that,
${{\nu }_{0}}=4\times {{10}^{15}}Hz$
$h=6.63\times {{10}^{-34}}Js$
Substituting this values in the equation,
$\begin{align}
& W=6.63\times {{10}^{-34}}\times 4\times {{10}^{15}} \\
& W=26.52\times {{10}^{-19}}J \\
\end{align}$
Now we have to convert this into electron volt
$\begin{align}
& W=\dfrac{26.52\times {{10}^{-19}}}{1.6\times {{10}^{-19}}} \\
& W=16.5eV \\
\end{align}$
So, the correct answer is “Option C”.
Note: The phenomenon has been fundamentally peculiar in the progression of modern physics. The photoelectric effect stays important in the research areas from materials science to astrophysics and also produces the basis for a variety of useful equipment. The device using this effect is having a fast response time.
Complete step by step answer:
Firstly, let us take a look at what actually the photoelectric effect means. Photoelectric effect is defined as a phenomenon in which electrically charged particles are ejected from or within a substance when it is absorbing electromagnetic radiation. The effect is sometimes explained as the ejection of electrons from a metal plate when light shines on it.
The x-intercept in the graph given is being the last point up to which only the photoelectric effect is non zero. Below this point there is no photo electric effect.
Therefore the work function of the material is given by the equation,
$W=h{{\nu }_{0}}$
Where $h$ is the Planck’s constant, ${{\nu }_{0}}$ is the threshold frequency.
From the graph we got an information that,
${{\nu }_{0}}=4\times {{10}^{15}}Hz$
$h=6.63\times {{10}^{-34}}Js$
Substituting this values in the equation,
$\begin{align}
& W=6.63\times {{10}^{-34}}\times 4\times {{10}^{15}} \\
& W=26.52\times {{10}^{-19}}J \\
\end{align}$
Now we have to convert this into electron volt
$\begin{align}
& W=\dfrac{26.52\times {{10}^{-19}}}{1.6\times {{10}^{-19}}} \\
& W=16.5eV \\
\end{align}$
So, the correct answer is “Option C”.
Note: The phenomenon has been fundamentally peculiar in the progression of modern physics. The photoelectric effect stays important in the research areas from materials science to astrophysics and also produces the basis for a variety of useful equipment. The device using this effect is having a fast response time.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Assertion The resistivity of a semiconductor increases class 13 physics CBSE
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
The branch of science which deals with nature and natural class 10 physics CBSE
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Write an application to the principal requesting five class 10 english CBSE
Difference Between Plant Cell and Animal Cell
a Tabulate the differences in the characteristics of class 12 chemistry CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
Discuss what these phrases mean to you A a yellow wood class 9 english CBSE
List some examples of Rabi and Kharif crops class 8 biology CBSE