1.

Work function of a metal is 2.51 eV. Its threshold frequency is                    [MP PET 1996; Pb. PET 2003]

A.            \[5.9\times {{10}^{14}}\]cycle/sec                                  
B.            \[6.5\times {{10}^{14}}cycle/\sec \]cycle/sec
C.            \[9.4\times {{10}^{14}}cycle/\sec \]cycle/sec            
D.            \[6.08\times {{10}^{14}}\] cycle/sec
Answer» E.


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