AIPMT PRELIMS2001Physics-Atomic Physics
AIPMT PRELIMS 2001 Physics Energy Levels MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The energy of hydrogen atom in nᵗʰ orbit is Eₙ then the energy in nᵗʰ orbit of singly ionised helium atom will be :-
A
4 Eₙ
B
Eₙ/4
C
2 Eₙ
D
Eₙ/2
Correct Answer
Option A
Detailed Explanation
The energy levels of helium are four times that of hydrogen due to the increased nuclear charge, E = Z²Eₙ.
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