Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
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Q · Structure of the AtomMedium · 45s
According to Bohr’s model, which of the following is constant for an electron in a given orbit?
TopicStructure of the Atom
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
In Bohr’s model, angular momentum is quantised and remains constant in an orbit: mvr=nh₂πmvr=n₂πh.
Final Answer: Option C — Angular momentum