PH-708
Charging by induction
Physics · Secondary 3 · Medium · Charging by induction
A neutral metal sphere on an insulating stand is to be charged negatively by induction using a positively charged rod.
Which step must happen WHILE the positively charged rod is held near the sphere?
Which step must happen WHILE the positively charged rod is held near the sphere?
- Connect the far side of the sphere to Earth, then remove the Earth connection before removing the rod
- Briefly touch the rod to the sphere so electrons can move directly
- Connect the rod to Earth so its charge flows into the sphere
- Connect the near side of the sphere to Earth, then remove the rod first
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