Solved UPSC CDS/OTA Question
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Q · Current ElectricityMedium · 45s
Which instrument is used to detect the presence of an electric charge? Option: 7
TopicCurrent Electricity
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.
An electrometer is sensitive to small static charges; a simple form is the gold-leaf electroscope.
7
Final Answer: Option A — Electrometer
7