In a photoelectric emission, electrons are ejected from metals X and Y by light of 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 graph illustrates the expected results?
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Correct option is
The answer is option A.
First, the gradient of the graph cannot change (always = h/e
), so answers are A or D.
If Y has a greater work function than X, then the graph for Y should have a more
negative y-intercept. therefore figure in option A depicts the concept.
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