Induction: Induced & Permanent Charging

Static electricity can be generated through: Friction, Conduction, INDUCTION

Induction

INDUCTION involves the movement of electrons in a neutral object when a charged object is brought close to the neutral object. The movement occurs WITHOUT DIRECT CONTACT between objects.

Induced Charge Separation/ Temporary Charging

When a negatively charged rod is brought close to a neutral metal rod, the electrons in the neutral rod move to one side of the object.
The electrons move back when the charged object is removed.
THIS IS A TEMPORARY CHARGE.
There is no change in the number of electrons on the object, so overall THE OBJECT REMAINS NEUTRAL.

Permanent Charging

When you take a temporarily charged object and ground it, the charged object retains its charge.
This is called permanent charging by induction.

Summary

Charging by induction always results in two objects with different charges.
The object that induces the charge keeps its original charge, while the object whose charge was induced receives the opposite charge.

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