Solved UPSC CDS/OTA Question
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Q · Units and DimensionsMedium · 45s
Statement: If the length is measured in km instead of meters, then the unit of energy in terms of SI units would:
TopicUnits and Dimensions
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.
Energy = Force × Distance. Force in N remains the same, but if distance is in km, then the unit will be 1000 m ⇒ Energy unit becomes 1000× larger for each meter ⇒ 1000³.
Final Answer: Option C — Become 10⁶ times