In charging by induction, the earth is used because the ground is a good:
AConductor
BInsulator
CContainer
DCondenser
Answer & Solution
Correct answer: A. Conductor
1. Excess charge must be able to flow away freely.
2. The earth can supply or accept charge easily.
3. So the ground is a good conductor.
_Source: OpenStax University Physics Volume 2, Chapter 5, Electric Charges and Fields._
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