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Stopping Potential

The following...

Question

The following graph shows the variation of photocurrent for a photosensitive metal:

(a) Identify the variable X on the horizontal axis.
(b) What does the point A on the horizontal axis represent?
(c) Draw this graph for three different values of frequencies of incident radiation $v_{1}, v_{2}, a n d v_{3} (v_{1} > v_{2} > v_{3})$ for same intensity.
(d) Draw this graph for three different values of intensities of incident radiation $I_{1}, I_{2} a n d I_{3} (I_{1} > I_{2} > I_{3})$ having same frequency.

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Solution

(a) X is anode potential.
(b) As no photocurrent flows for the potential value at A, A represents the stopping potential.
(c)

(d)

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