First slide

Photo Electric Effect

Question

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

Moderate

A

greater than that of B
B

smaller than that of B
C

same as that of B
D

such that no comparison can be done from given graph

Solution

The i!intersect of the graph with v-axis gives the threshold frequency v₀ .As v₀is s less for A and hence
the work-function $W_{0} = {hv}_{0}$ is less for A

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