Given below are two statements : Statement I : Stopping potential… - Vidyadip

MCQ

Given below are two statements :

Statement $I :$ Stopping potential in photoelectric effect does not depend on the power of the light source.

Statement $II :$ For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light.

In the light of above statements, choose the most appropriate answer from the options given below.

Options :

A
Statement $I$ is incorrect but statement $II$ is correct
B
Both Statement $I$ and Statement $II$ are incorrect
C
Statement $I$ is correct but statement $II$ is incorrect
✓
Both statement $I$ and statement $II$ are correct

✓

Answer

Correct option: D.

Both statement $I$ and statement $II$ are correct

d
Stopping potential $V _{ S }=\frac{ KE _{\max }}{ e }$

$V _{ S }=\frac{\frac{ hC }{ \lambda }-\phi}{ e }$

Stopping potential does not depend on intensity or power of light used, it only depends on frequency or wavelength of incident light.

So both statements $I$ and $II$ are correct

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