A) \[\text{PtA1K}\]
B) \[\text{A1PtK}\]
C) \[\text{KA1Pt}\]
D) \[\text{A1KPt}\]
Correct Answer: A
Solution :
Work function, \[{{W}_{0}}=h{{v}_{0}}\] (where, \[{{v}_{0}}=\] Threshold frequency) So, \[{{W}_{0}}\propto {{v}_{0}}\] Hence, \[Pt>Al>K\]
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