Question: Q. 4. The following graph shows the variation of photocurrent for a photosensitive metal :
(i) Identify the variable $X$ on the horizontal axis.
(ii) What does the point $A$ on the horizontal axis represent?
(iii) Draw this graph for three different values of frequencies of incident radiation $v_{1}, v_{2}$ and $v_{3}\left(v_{1}\right.$ $>v_{2}>v_{3}$ ) for same intensity.
(iv) Draw this graph for three different values of intensities of incident radiation $I_{1}, I_{2}$ and $I_{3}\left(I_{1}>\right.$ $I_{2}>I_{3}$ ) having same frequency.
U] [OD III 2017]
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Solution:
Ans. (i) $X$ is collector plate potential.
$1 / 2$
(ii) A is stopping potential.
$1 / 2$
(iii) Graph for different frequencies :
(iv) Graph for three different intensities :
[CBSE Marking Scheme 2017]
