AIPMT MAINS2011Physics-Modern Physics
AIPMT MAINS 2011 Physics Photoelectric Effect MCQ Question
Type: MCQ-numerical-Medium-Class 12
The threshold frequency for a photosensitive metal is 3.3 × 10¹⁴ Hz. If light of frequency 8.2 × 10¹⁴ Hz is incident on this metal, the cut-off voltage for the photoelectric emission is nearly
A
5 V
B
1 V
C
2 V
D
3 V
Correct Answer
Option C
Detailed Explanation
Using the photoelectric equation, the cut-off voltage is calculated using the difference in frequencies and Planck's constant, resulting in approximately 2 V.
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