O-LevelPhysicsElectricity5054/11 · May/June 2011 · Q271 Mark
To charge an isolated metal sphere by induction, the following four processes are required. P The sphere is earthed by touching it. Q The earth connection is removed from the sphere. R A charged rod is brought close to the sphere. S The charged rod is removed. In which order can these stages be carried out to charge the isolated metal sphere?
AP→Q→R→S
BP→R→S → Q
CR→P→Q→S
DR→P→S→Q
✓ Correct answer
C: R→P→Q→S
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