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QAIPMT-2010-Ph-2086: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-2086 Solution: The potential difference that must be applied to stop the…
The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work functions 5.01 eV, when ultraviolet light of 200 nm falls on it, must be
Multiple Choice Options
- A 2.4 V
- B V
- C V
- D 1.2 V
Step-by-Step Verified Solution
According to Einstein�s photoelectric equation
eV s = h _ - _
_ eV s = h c _ - _
= 1240 200 - 5.01
= 6.2 eV � 5.01 eV = 1.2 eV
Stopping potential, V s = 1.2 V
The potential difference that must be applied to stop photoelectrons = � V s = � 1.2 V