The threshold frequency for a photosensitive metal is 
Hz. If light of frequency 
Hz is incident on this metal, the cut‐off voltage for the photoelectron emission is nearly
Text Solution
Verified by ExpertsThe correct answer is:
B
According to Einstein’s photoelectric equation
where, 
Incident frequency
Threshold frequency
Cut‐off or stopping potential
or 
Substituting the given values, we get
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