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Question

In a photoelectric experiment, electrons are ejected from metals X and Y by light of intensity I and frequency f. The potential difference V required to stop the electrons is measured for various frequencies. If Y has a greater work function than X; which one of the following graphs best illustrates the expected results?


A

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B

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C

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D

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Solution

The correct option is A


Greater work function means more negative potential is required to stop the ejection of electrons. Moreover, the slope of both the graphs will be the same.


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