PH-2137
Charging by induction
Physics · Secondary 4 · Hard · Charging by induction
A neutral metal sphere is mounted on an insulating stand. A negatively charged rod is brought close to the left side of the sphere (without touching). The right side of the sphere is then briefly connected to earth by a wire, and the wire is removed before the rod is taken away.
After all this, what is the final charge on the sphere?
After all this, what is the final charge on the sphere?
- The sphere becomes positively charged overall
- The sphere remains neutral overall
- The sphere becomes negatively charged overall
- The left side is positive and the right side is negative overall
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