AIPMT MAINS2010Physics-Modern Physics
AIPMT MAINS 2010 Physics Photoelectric Effect MCQ Question
Type: MCQ-numerical-Medium-Class 12
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 Eₙ = -13.6 eV/n²)
A
5.1 V
B
12.1 V
C
17.2 V
D
7 V
Correct Answer
Option D
Detailed Explanation
The energy difference ΔE = 12.1 eV. The stopping potential V = (12.1 − 5.1) V = 7 V.
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