Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · GravitationMedium · 45s
Which of the following correctly gives dimensions of G?
TopicGravitation
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.
From F = Gm₁m₂/r² ⇒ G = Fr²/(m₁m₂) ⇒ [MLT⁻²][L²][M⁻²] = M⁻¹L³T⁻².
Final Answer: Option A — [M⁻¹L³T⁻²]