Question 76: Dual Nature of Matter and Radiation

Question

In photoelectric effect, the stopping potential $\left(\mathrm{V}_0\right) \mathrm{v} / \mathrm{s}$ frequency $(v)$ curve is plotted.
( h is the Planck's constant and $\phi_0$ is work function of metal )
(A) $\mathrm{V}_0 \mathrm{v} / \mathrm{s} v$ is linear.
(B) The slope of $\mathrm{V}_0 \mathrm{v} / \mathrm{s} v$ curve $=\frac{\phi_0}{\mathrm{~h}}$
(C) h constant is related to the slope of $\mathrm{V}_0 \mathrm{v} / \mathrm{s} v$ line.
(D) The value of electric charge of electron is not required to determine h using the $\mathrm{V}_0 \mathrm{v} / \mathrm{s} v$ curve.
(E) The work function can be estimated without knowing the value of $h$.
Choose the correct answer from the options given below :

Accepted Answer

$$\begin{aligned}
& \mathrm{hv}=\phi+\mathrm{KE}_{\max } \
& \mathrm{KE}_{\max }=\mathrm{eV}_0 \
& \mathrm{~V}_0=\frac{\mathrm{hv}-\phi}{\mathrm{e}}
\end{aligned}$$
(A) $\mathrm{V}_0 \mathrm{v} / \mathrm{s} \mathrm{V}$ is linear correct
(B) Slope
$$\mathrm{v}_0=\left(\frac{\mathrm{h}}{\mathrm{e}}ight) \mathrm{v}-\frac{\phi}{\mathrm{e}} 	ext { Wrong }$$
Slope $\frac{\mathrm{h}}{\mathrm{e}}$
(C) Correct
(D) Incorrect
(E) Correct

Answer

(A), (C) and (E) only

Answer

(C) and (D) only

Answer

(A), (B) and (C) only

Answer

(D) and (E) only

Dual Nature of Matter and Radiation

Choose the correct answer: