In photoelectric effect, the stopping potential ( V 0 ) v / s frequency ( ν ) curve is plotted. ( h is the Planck's constant and ϕ 0 is work function of metal ) (A) V 0 v / s ν is linear. (

Question

In photoelectric effect, the stopping potential $(V_{0}) v / s$ frequency $(ν)$ curve is plotted.
( h is the Planck's constant and $ϕ_{0}$ is work function of metal )
(A) $V_{0} v / s ν$ is linear.
(B) The slope of $V_{0} v / s ν$ curve $= \frac{ϕ _{0}}{h}$
(C) h constant is related to the slope of $V_{0} v / s ν$ line.
(D) The value of electric charge of electron is not required to determine $h$ using the $V_{0} v / s ν$ curve.
(E) The work function can be estimated without knowing the value of $h$ .

Choose the correct answer from the options given below :

Options:

Answer:

B

Solution:

$hv = ϕ + KE_{m a x} KE_{m a x} = eV_{0} V_{0} = \frac{hv - ϕ}{e}$
(A) $V_{0} v / sV$ is linear correct
(B) Slope
$v_{0} = (\frac{h}{e}) v - \frac{ϕ}{e} Wrong$

Slope $\frac{h}{e}$
(C) Correct
(D) Incorrect
(E) Correct

TestHub · Accepted Answer

​ hv = ϕ + KE m a x ​ KE m a x ​ = eV 0 ​ V 0 ​ = e hv − ϕ ​ ​ (A) V 0 ​ v / sV is linear correct (B) Slope v 0 ​ = ( e h ​ ) v − e ϕ ​ Wrong Slope e h ​ (C) Correct (D) Incorrect (E) Correct

Physics - Modern Physics Question with Solution | TestHub

Options:

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