First slide

Photo Electric Effect

Question

The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is

Easy

A

Greater than that of B
B

Smaller than that of B
C

Equal to that of B
D

No inference can be drawn about their work functions from the given graphs

Solution

From the given graph it is clear that if we extend the given graph for I and B, intercept of the line A on V axis will be smaller as compared to line B means work function of A is smaller than that of B.

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