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QAIPMT-2010-Ph-1984: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-1984 Solution: The electron in the hydrogen atom jumps from excited state (n = …
The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in nth state eV)
Multiple Choice Options
- A 5.1 V
- B 12.1 V
- C 17.2 V
- D 7 V
Step-by-Step Verified Solution
E = h _ = E 3 - E 1
= _ 13.6 3 2 _ ( _ 13.6 1 2 )
= 12.1 eV
Therefore, stopping potential
eV 0 = h _ - _
= (12.1 � 5.1) eV
V 0 = 7 V