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 v1,v2 and v3(v1 >v2>v3 ) for same intensity.

(iv) Draw this graph for three different values of intensities of incident radiation I1,I2 and I3(I1> I2>I3 ) 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]



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