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Question

The graph shows variation of stopping potential $V_{0}$ versus frequency of incident radiation v for two photosensitive metals A and B. Which of the two metals has higher threshold frequency and why?

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Solution

Metal A has higher threshold frequency because from the graph it is clear that the minimum frequency required to start photoemission is more in the case of metal A than in case of metal B.

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Q. The graph shows variation of stopping potential

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